diff --git a/arm9/source/common/swkbd.c b/arm9/source/common/swkbd.c
index 978e896..f4125fd 100644
--- a/arm9/source/common/swkbd.c
+++ b/arm9/source/common/swkbd.c
@@ -146,8 +146,8 @@ static void DrawTextBox(const TouchBox* txtbox, const char* inputstr, const u32
     // draw input string
     DrawStringF(BOT_SCREEN, x, y, COLOR_STD_FONT, COLOR_STD_BG, "%c%-*.*s%c",
         (*scroll) ? '<' : '|',
-        input_shown_size,
-        input_shown_size,
+        (int) input_shown_size,
+        (int) input_shown_size,
         (*scroll > inputstr_size) ? "" : inputstr + *scroll,
         (inputstr_size - (s32) *scroll > input_shown_size) ? '>' : '|'
     );
@@ -159,11 +159,11 @@ static void DrawTextBox(const TouchBox* txtbox, const char* inputstr, const u32
     }
 
     DrawStringF(BOT_SCREEN, x-(FONT_WIDTH_EXT/2), y+10, COLOR_STD_FONT, COLOR_STD_BG, "%-*.*s^%-*.*s",
-        1 + cpos,
-        1 + cpos,
+        (int) (1 + cpos),
+        (int) (1 + cpos),
         "",
-        input_shown_length - cpos,
-        input_shown_length - cpos,
+        (int) (input_shown_length - cpos),
+        (int) (input_shown_length - cpos),
         ""
     );
 }
@@ -255,7 +255,7 @@ bool ShowKeyboard(char* inputstr, const u32 max_size, const char *format, ...) {
     static bool show_instr = true;
     static const char* instr = "Keyboard Controls:\n \n←/→ - Move cursor\nR - Caps / Capslock\nX - Delete char\nY - Insert char\nA - Submit\nB - Cancel\n \nSELECT switches to\nclassic prompt";
     if (show_instr) {
-        ShowPrompt(false, instr);
+        ShowPrompt(false, "%s", instr);
         show_instr = false;
     }
 
@@ -332,7 +332,7 @@ bool ShowKeyboard(char* inputstr, const u32 max_size, const char *format, ...) {
             swkbd = swkbd_numpad;
         } else if (key == KEY_SWITCH) {
             ClearScreen(BOT_SCREEN, COLOR_STD_BG);
-            return ShowStringPrompt(inputstr, max_size, str);
+            return ShowStringPrompt(inputstr, max_size, "%s", str);
         } else if (key == KEY_UNICODE) {
             if (cursor > 3 && cursor <= inputstr_size) {
                 u16 codepoint = 0;
diff --git a/arm9/source/common/ui.c b/arm9/source/common/ui.c
index d8fb7cb..f8fc1e4 100644
--- a/arm9/source/common/ui.c
+++ b/arm9/source/common/ui.c
@@ -705,7 +705,7 @@ void ShowIconString(u16* icon, int w, int h, const char *format, ...)
     vsnprintf(str, STRBUF_SIZE, format, va);
     va_end(va);
 
-    ShowIconStringF(MAIN_SCREEN, icon, w, h, str);
+    ShowIconStringF(MAIN_SCREEN, icon, w, h, "%s", str);
 }
 
 bool ShowPrompt(bool ask, const char *format, ...)
@@ -936,7 +936,8 @@ u32 ShowFileScrollPrompt(u32 n, const DirEntry** options, bool hide_ext, const c
         if (n - n_show - scroll) {
             char more_str[64 + 1];
             snprintf(more_str, 64, "   [%d more]", (int)(n - (n_show-1) - scroll));
-            DrawStringF(MAIN_SCREEN, x, yopt + (line_height+2)*(n_show-1), COLOR_LIGHTGREY, COLOR_STD_BG, "%-*s", item_width / font_width, more_str);
+            DrawStringF(MAIN_SCREEN, x, yopt + (line_height+2)*(n_show-1), COLOR_LIGHTGREY, COLOR_STD_BG,
+                    "%-*s", (int) (item_width / font_width), more_str);
         }
         // show scroll bar
         u32 bar_x = x + item_width + 2;
@@ -1076,15 +1077,15 @@ bool ShowInputPrompt(char* inputstr, u32 max_size, u32 resize, const char* alpha
 
         DrawStringF(MAIN_SCREEN, x, y + str_height - 76, COLOR_STD_FONT, COLOR_STD_BG, "%c%-*.*s%c\n%-*.*s^%-*.*s",
             (scroll) ? '<' : '|',
-            input_shown_size,
-            input_shown_size,
+            (int) input_shown_size,
+            (int) input_shown_size,
             (scroll > inputstr_size) ? "" : inputstr + scroll,
             (inputstr_size - (s32) scroll > input_shown_size) ? '>' : '|',
-            1 + cpos,
-            1 + cpos,
+            (int) 1 + cpos,
+            (int) 1 + cpos,
             "",
-            input_shown_length - cpos,
-            input_shown_length - cpos,
+            (int) input_shown_length - cpos,
+            (int) input_shown_length - cpos,
             ""
         );
 
@@ -1432,7 +1433,7 @@ int ShowBrightnessConfig(int set_brightness)
     // draw initial UI stuff
     DrawStringF(MAIN_SCREEN,
         (SCREEN_WIDTH_MAIN - GetDrawStringWidth(brightness_str)) / 2,
-        (SCREEN_HEIGHT / 4) * 2, COLOR_STD_FONT, COLOR_STD_BG, brightness_str);
+        (SCREEN_HEIGHT / 4) * 2, COLOR_STD_FONT, COLOR_STD_BG, "%s", brightness_str);
 
     // draw all color gradient bars
     for (int x = 0; x < bar_width; x++) {
diff --git a/arm9/source/godmode.c b/arm9/source/godmode.c
index d0bc1e7..81ee624 100644
--- a/arm9/source/godmode.c
+++ b/arm9/source/godmode.c
@@ -144,14 +144,14 @@ u32 SplashInit(const char* modestr) {
     }
 
     if (modestr) DrawStringF(TOP_SCREEN, SCREEN_WIDTH_TOP - 10 - GetDrawStringWidth(modestr),
-        SCREEN_HEIGHT - 10 - GetDrawStringHeight(modestr), COLOR_STD_FONT, COLOR_TRANSPARENT, modestr);
+        SCREEN_HEIGHT - 10 - GetDrawStringHeight(modestr), COLOR_STD_FONT, COLOR_TRANSPARENT, "%s", modestr);
 
     DrawStringF(BOT_SCREEN, pos_xb, pos_yb, COLOR_STD_FONT, COLOR_STD_BG, "%s\n%*.*s\n%s\n \n \n%s\n%s\n \n%s\n%s",
         namestr, strnlen(namestr, 64), strnlen(namestr, 64),
         "--------------------------------", "https://github.com/d0k3/GodMode9",
         "Releases:", "https://github.com/d0k3/GodMode9/releases/", // this won't fit with a 8px width font
         "Hourlies:", "https://d0k3.secretalgorithm.com/");
-    DrawStringF(BOT_SCREEN, pos_xu, pos_yu, COLOR_STD_FONT, COLOR_STD_BG, loadstr);
+    DrawStringF(BOT_SCREEN, pos_xu, pos_yu, COLOR_STD_FONT, COLOR_STD_BG, "%s", loadstr);
     DrawStringF(BOT_SCREEN, pos_xb, pos_yu, COLOR_STD_FONT, COLOR_STD_BG, "built: " DBUILTL);
 
     return 0;
@@ -330,7 +330,7 @@ void DrawUserInterface(const char* curr_path, DirEntry* curr_entry, u32 curr_pan
         snprintf(bytestr, 31, "%s Byte", numstr);
         ResizeString(tempstr, bytestr, str_len_info, 8, false);
     }
-    DrawStringF(MAIN_SCREEN, 4, info_start + 12 + 10, color_current, COLOR_STD_BG, tempstr);
+    DrawStringF(MAIN_SCREEN, 4, info_start + 12 + 10, color_current, COLOR_STD_BG, "%s", tempstr);
     // path of file (if in search results)
     if ((DriveType(curr_path) & DRV_SEARCH) && strrchr(curr_entry->path, '/')) {
         char dirstr[256];
@@ -345,7 +345,7 @@ void DrawUserInterface(const char* curr_path, DirEntry* curr_entry, u32 curr_pan
 
     // right top - clipboard
     DrawStringF(MAIN_SCREEN, SCREEN_WIDTH_MAIN - len_info, info_start, COLOR_STD_FONT, COLOR_STD_BG, "%*s",
-        len_info / FONT_WIDTH_EXT, (clipboard->n_entries) ? "[CLIPBOARD]" : "");
+        (int) (len_info / FONT_WIDTH_EXT), (clipboard->n_entries) ? "[CLIPBOARD]" : "");
     for (u32 c = 0; c < n_cb_show; c++) {
         u32 color_cb = COLOR_ENTRY(&(clipboard->entry[c]));
         ResizeString(tempstr, (clipboard->n_entries > c) ? clipboard->entry[c].name : "", str_len_info, 8, true);
@@ -354,7 +354,7 @@ void DrawUserInterface(const char* curr_path, DirEntry* curr_entry, u32 curr_pan
     *tempstr = '\0';
     if (clipboard->n_entries > n_cb_show) snprintf(tempstr, 60, "+ %lu more", clipboard->n_entries - n_cb_show);
     DrawStringF(MAIN_SCREEN, SCREEN_WIDTH_MAIN - len_info - 4, info_start + 12 + (n_cb_show*10), COLOR_DARKGREY, COLOR_STD_BG,
-        "%*s", len_info / FONT_WIDTH_EXT, tempstr);
+        "%*s", (int) (len_info / FONT_WIDTH_EXT), tempstr);
 
     // bottom: instruction block
     char instr[512];
@@ -370,7 +370,7 @@ void DrawUserInterface(const char* curr_path, DirEntry* curr_entry, u32 curr_pan
         "R+←→ - Switch to prev/next pane\n",
         (clipboard->n_entries) ? "SELECT - Clear Clipboard\n" : "SELECT - Restore Clipboard\n", // only if clipboard is full
         "START - Reboot / [+R] Poweroff\nHOME button for HOME menu"); // generic end part
-    DrawStringF(MAIN_SCREEN, instr_x, SCREEN_HEIGHT - 4 - GetDrawStringHeight(instr), COLOR_STD_FONT, COLOR_STD_BG, instr);
+    DrawStringF(MAIN_SCREEN, instr_x, SCREEN_HEIGHT - 4 - GetDrawStringHeight(instr), COLOR_STD_FONT, COLOR_STD_BG, "%s", instr);
 }
 
 void DrawDirContents(DirStruct* contents, u32 cursor, u32* scroll) {
@@ -573,11 +573,11 @@ u32 FileHexViewer(const char* path) {
     static bool show_instr = true;
     static const char* instr = "Hexeditor Controls:\n \n↑↓→←(+R) - Scroll\nR+Y - Switch view\nX - Search / goto...\nA - Enter edit mode\nA+↑↓→← - Edit value\nB - Exit\n";
     if (show_instr) { // show one time instructions
-        ShowPrompt(false, instr);
+        ShowPrompt(false, "%s", instr);
         show_instr = false;
     }
 
-    if (MAIN_SCREEN != TOP_SCREEN) ShowString(instr);
+    if (MAIN_SCREEN != TOP_SCREEN) ShowString("%s", instr);
     memcpy(bottom_cpy, BOT_SCREEN, SCREEN_SIZE_BOT);
 
     data = buffer;
@@ -708,7 +708,7 @@ u32 FileHexViewer(const char* path) {
 
             // draw offset / ASCII representation
             if (x_off >= 0) DrawStringF(screen, x_off - x0, y, cutoff ? COLOR_HVOFFS : COLOR_HVOFFSI,
-                COLOR_STD_BG, "%08X", (unsigned int) offset + curr_pos);
+                COLOR_STD_BG, "%08X", (unsigned int) (offset + curr_pos));
             if (x_ascii >= 0) {
                 for (u32 i = 0; i < cols; i++)
                     DrawCharacter(screen, ascii[i], x_ascii - x0 + (FONT_WIDTH_EXT * i), y, COLOR_HVASCII, COLOR_STD_BG);
@@ -799,7 +799,7 @@ u32 FileHexViewer(const char* path) {
                 // check for user edits
                 u32 diffs = 0;
                 for (u32 i = 0; i < edit_bsize; i++) if (buffer[i] != buffer_cpy[i]) diffs++;
-                if (diffs && ShowPrompt(true, "You made edits in %i place(s).\nWrite changes to file?", diffs))
+                if (diffs && ShowPrompt(true, "You made edits in %lu place(s).\nWrite changes to file?", diffs))
                     if (!FileSetData(path, buffer, min(edit_bsize, (fsize - edit_start)), edit_start, false))
                         ShowPrompt(false, "Failed writing to file!");
                 data = buffer;
@@ -1295,8 +1295,9 @@ u32 FileHandlerMenu(char* current_path, u32* cursor, u32* scroll, PaneData** pan
     if (searchdrv > 0) optionstr[searchdrv-1] = "Open containing folder";
     if (titleman > 0) optionstr[titleman-1] = "Open title folder";
 
-    int user_select = ShowSelectPrompt(n_opt, optionstr, (n_marked > 1) ?
-        "%s%0.0s\n(%lu files selected)" : "%s%s", pathstr, tidstr, n_marked);
+    int user_select = (int) ((n_marked > 1) ?
+        ShowSelectPrompt(n_opt, optionstr, "%s\n(%lu files selected)", pathstr, n_marked) :
+        ShowSelectPrompt(n_opt, optionstr, "%s%s", pathstr, tidstr));
     if (user_select == hexviewer) { // -> show in hex viewer
         FileHexViewer(file_path);
         GetDirContents(current_dir, current_path);
@@ -1484,8 +1485,9 @@ u32 FileHandlerMenu(char* current_path, u32* cursor, u32* scroll, PaneData** pan
     if (setup > 0) optionstr[setup-1] = "Set as default";
 
     // auto select when there is only one option
-    user_select = (n_opt <= 1) ? n_opt : (int) ShowSelectPrompt(n_opt, optionstr, (n_marked > 1) ?
-        "%s%0.0s\n(%lu files selected)" : "%s%s", pathstr, tidstr, n_marked);
+    user_select = (n_opt <= 1) ? n_opt : (int) ((n_marked > 1) ?
+        ShowSelectPrompt(n_opt, optionstr, "%s\n(%lu files selected)", pathstr, n_marked) :
+        ShowSelectPrompt(n_opt, optionstr, "%s%s", pathstr, tidstr));
     if (user_select == mount) { // -> mount file as image
         const char* mnt_drv_paths[] = { "7:", "G:", "K:", "T:", "I:", "D:" }; // maybe move that to fsdrive.h
         if (clipboard->n_entries && (DriveType(clipboard->entry[0].path) & DRV_IMAGE))
@@ -1523,8 +1525,9 @@ u32 FileHandlerMenu(char* current_path, u32* cursor, u32* scroll, PaneData** pan
         if (cryptable_inplace) {
             optionstr[0] = "Decrypt to " OUTPUT_PATH;
             optionstr[1] = "Decrypt inplace";
-            user_select = (int) ShowSelectPrompt(2, optionstr, (n_marked > 1) ?
-                "%s%0.0s\n(%lu files selected)" : "%s%s", pathstr, tidstr, n_marked);
+            user_select = (int) ((n_marked > 1) ?
+                ShowSelectPrompt(2, optionstr, "%s\n(%lu files selected)", pathstr, n_marked) :
+                ShowSelectPrompt(2, optionstr, "%s%s", pathstr, tidstr));
         } else user_select = 1;
         bool inplace = (user_select == 2);
         if (!user_select) { // do nothing when no choice is made
@@ -1577,8 +1580,9 @@ u32 FileHandlerMenu(char* current_path, u32* cursor, u32* scroll, PaneData** pan
         if (cryptable_inplace) {
             optionstr[0] = "Encrypt to " OUTPUT_PATH;
             optionstr[1] = "Encrypt inplace";
-            user_select = (int) ShowSelectPrompt(2, optionstr,  (n_marked > 1) ?
-                "%s%0.0s\n(%lu files selected)" : "%s%s", pathstr, tidstr, n_marked);
+            user_select = (int) ((n_marked > 1) ?
+                ShowSelectPrompt(2, optionstr, "%s\n(%lu files selected)", pathstr, n_marked) :
+                ShowSelectPrompt(2, optionstr, "%s%s", pathstr, tidstr));
         } else user_select = 1;
         bool inplace = (user_select == 2);
         if (!user_select) { // do nothing when no choice is made
@@ -1677,8 +1681,9 @@ u32 FileHandlerMenu(char* current_path, u32* cursor, u32* scroll, PaneData** pan
         if (CheckVirtualDrive("E:")) {
             optionstr[0] = "Install to SysNAND";
             optionstr[1] = "Install to EmuNAND";
-            user_select = (int) ShowSelectPrompt(2, optionstr,  (n_marked > 1) ?
-                "%s%0.0s\n(%lu files selected)" : "%s%s", pathstr, tidstr, n_marked);
+            user_select = (int) ((n_marked > 1) ?
+                ShowSelectPrompt(2, optionstr, "%s\n(%lu files selected)", pathstr, n_marked) :
+                ShowSelectPrompt(2, optionstr, "%s%s", pathstr, tidstr));
             if (!user_select) return 0;
             else to_emunand = (user_select == 2);
         }
@@ -2195,7 +2200,7 @@ u32 HomeMoreMenu(char* current_path) {
     if (sysinfo > 0) optionstr[sysinfo - 1] = "System info";
     if (readme > 0) optionstr[readme - 1] = "Show ReadMe";
 
-    int user_select = ShowSelectPrompt(n_opt, optionstr, promptstr);
+    int user_select = ShowSelectPrompt(n_opt, optionstr, "%s", promptstr);
     if (user_select == sdformat) { // format SD card
         bool sd_state = CheckSDMountState();
         char slabel[DRV_LABEL_LEN] = { '\0' };
@@ -2223,7 +2228,7 @@ u32 HomeMoreMenu(char* current_path) {
         return 0;
     }
     else if (user_select == multi) { // switch EmuNAND offset
-        while (ShowPrompt(true, "Current EmuNAND offset is %06X.\nSwitch to next offset?", GetEmuNandBase())) {
+        while (ShowPrompt(true, "Current EmuNAND offset is %06lX.\nSwitch to next offset?", GetEmuNandBase())) {
             if (clipboard->n_entries && (DriveType(clipboard->entry[0].path) & DRV_EMUNAND))
                 clipboard->n_entries = 0; // remove EmuNAND clipboard entries
             DismountDriveType(DRV_EMUNAND);
@@ -2264,7 +2269,7 @@ u32 HomeMoreMenu(char* current_path) {
             if (!seed_sys || BuildSeedInfo(NULL, true) != 0)
                 seed_sys = seed_emu = false;
         }
-        ShowPrompt(false, "Built in " OUTPUT_PATH ":\n \n%18.18-s %s\n%18.18-s %s\n%18.18-s %s",
+        ShowPrompt(false, "Built in " OUTPUT_PATH ":\n \n%-18.18s %s\n%-18.18s %s\n%-18.18s %s",
             TIKDB_NAME_ENC, tik_enc_sys ? tik_enc_emu ? "OK (Sys&Emu)" : "OK (Sys)" : "Failed",
             TIKDB_NAME_DEC, tik_dec_sys ? tik_dec_emu ? "OK (Sys&Emu)" : "OK (Sys)" : "Failed",
             SEEDINFO_NAME, seed_sys ? seed_emu ? "OK (Sys&Emu)" : "OK (Sys)" : "Failed");
@@ -2277,7 +2282,7 @@ u32 HomeMoreMenu(char* current_path) {
         int emu = (CheckHealthAndSafetyInject("4:") == 0) ? (int) ++n_opt : -1;
         if (sys > 0) optionstr[sys - 1] = "Restore H&S (SysNAND)";
         if (emu > 0) optionstr[emu - 1] = "Restore H&S (EmuNAND)";
-        user_select = (n_opt > 1) ? ShowSelectPrompt(n_opt, optionstr, promptstr) : n_opt;
+        user_select = (n_opt > 1) ? ShowSelectPrompt(n_opt, optionstr, "%s", promptstr) : n_opt;
         if (user_select > 0) {
             InjectHealthAndSafety(NULL, (user_select == sys) ? "1:" : "4:");
             GetDirContents(current_dir, current_path);
@@ -2719,14 +2724,14 @@ u32 GodMode(int entrypoint) {
                         if (current_dir->entry[c].marked) n_marked++;
                 }
                 if (n_marked) {
-                    if (ShowPrompt(true, "Delete %u path(s)?", n_marked)) {
+                    if (ShowPrompt(true, "Delete %lu path(s)?", n_marked)) {
                         u32 n_errors = 0;
                         ShowString("Deleting files, please wait...");
                         for (u32 c = 0; c < current_dir->n_entries; c++)
                             if (current_dir->entry[c].marked && !PathDelete(current_dir->entry[c].path))
                                 n_errors++;
                         ClearScreenF(true, false, COLOR_STD_BG);
-                        if (n_errors) ShowPrompt(false, "Failed deleting %u/%u path(s)", n_errors, n_marked);
+                        if (n_errors) ShowPrompt(false, "Failed deleting %lu/%lu path(s)", n_errors, n_marked);
                     }
                 } else if (curr_entry->type != T_DOTDOT) {
                     char namestr[UTF_BUFFER_BYTESIZE(28)];
@@ -2881,7 +2886,7 @@ u32 GodMode(int entrypoint) {
                     u32 tmnum = 2;
                     if (!CheckSDMountState() || (tmnum = ShowSelectPrompt(
                         (CheckVirtualDrive("E:")) ? 4 : 2, tmoptionstr,
-                        "Title manager menu.\nSelect titles source:", buttonstr))) {
+                        "Title manager menu.\nSelect titles source:"))) {
                         const char* tpath = tmpaths[tmnum-1];
                         if (InitImgFS(tpath)) {
                             SetTitleManagerMode(true);
diff --git a/arm9/source/system/xrq.c b/arm9/source/system/xrq.c
index aa36af2..06c52cd 100644
--- a/arm9/source/system/xrq.c
+++ b/arm9/source/system/xrq.c
@@ -94,7 +94,7 @@ void XRQ_DumpRegisters(u32 xrq, u32 *regs)
     u32 draw_y_upd = draw_y + draw_height - 10;
 
     ClearScreen(MAIN_SCREEN, COLOR_STD_BG);
-    DrawStringF(MAIN_SCREEN, draw_x, draw_y, COLOR_STD_FONT, COLOR_STD_BG, dumpstr);
+    DrawStringF(MAIN_SCREEN, draw_x, draw_y, COLOR_STD_FONT, COLOR_STD_BG, "%s", dumpstr);
 
     /* Dump STACK */
     sp = regs[13] & ~0xF;
diff --git a/arm9/source/utils/gameutil.c b/arm9/source/utils/gameutil.c
index 79a9a2b..ed134fb 100644
--- a/arm9/source/utils/gameutil.c
+++ b/arm9/source/utils/gameutil.c
@@ -744,7 +744,7 @@ u32 VerifyNcsdFile(const char* path) {
         if (!size) continue;
         if (VerifyNcchFile(path, offset, size) != 0) {
             ShowPrompt(false, "%s\nContent%lu (%08lX@%08lX):\nVerification failed",
-                pathstr, i, size, offset, i);
+                pathstr, i, size, offset);
             return 1;
         }
     }
@@ -789,7 +789,7 @@ u32 VerifyCiaFile(const char* path) {
         if (!(cnt_index[index/8] & (1 << (7-(index%8))))) continue; // don't check missing contents
         if (VerifyTmdContent(path, next_offset, chunk, titlekey) != 0) {
             ShowPrompt(false, "%s\nID %08lX (%08llX@%08llX)\nVerification failed",
-                pathstr, getbe32(chunk->id), getbe64(chunk->size), next_offset, i);
+                pathstr, getbe32(chunk->id), getbe64(chunk->size), next_offset);
             free(cia);
             return 1;
         }
@@ -927,7 +927,7 @@ u32 VerifyFirmFile(const char* path) {
         void* section = ((u8*) firm_buffer) + sct->offset;
         if (!(sct->size)) continue;
         if (sha_cmp(sct->hash, section, sct->size, SHA256_MODE) != 0) {
-            ShowPrompt(false, "%s\nSection %u hash mismatch", pathstr, i);
+            ShowPrompt(false, "%s\nSection %lu hash mismatch", pathstr, i);
             free(firm_buffer);
             return 1;
         }
@@ -3589,7 +3589,7 @@ u32 ShowGameCheckerInfo(const char* path) {
         if (!ShowPrompt(state_verify < 0,
                 "%s\n%s %s Title\n \n"
                 "Title ID: %016llX\n"
-                "Title version: %u.%u.%u\n"
+                "Title version: %lu.%lu.%lu\n"
                 "Contents size: %s\n"
                 "%s\n%s \n"
                 "Ticket/TMD: %s/%s\n"
diff --git a/arm9/source/utils/nandutil.c b/arm9/source/utils/nandutil.c
index 745e4d1..c2233e3 100644
--- a/arm9/source/utils/nandutil.c
+++ b/arm9/source/utils/nandutil.c
@@ -360,7 +360,7 @@ u32 ValidateNandDump(const char* path) {
             if (!p_sector) continue;
             if ((ReadNandFile(&file, fat, info.sector + p_sector, 1, info.keyslot) != 0) ||
                 (ValidateFatHeader(fat) != 0)) {
-                ShowPrompt(false, "%s\nError: %s partition%u is corrupt", pathstr, section_type, p);
+                ShowPrompt(false, "%s\nError: %s partition%lu is corrupt", pathstr, section_type, p);
                 fvx_close(&file);
                 return 1;
             }
@@ -558,7 +558,7 @@ u32 SafeInstallFirmBuffered(const char* path, u32 slots, u8* buffer, u32 bufsiz)
     // if (!SetWritePermissions(PERM_SYS_LVL3, true)) return 1; // one unlock sequence is enough
 
     // point of no return
-    ShowString(false, "Installing FIRM, please wait...");
+    ShowString("Installing FIRM, please wait...");
     if (fix_sector0x96 && (WriteNandSectors(sector0x96, 0x96, 1, 0x11, NAND_SYSNAND) != 0)) {
         ShowPrompt(false, "!THIS IS BAD!\n \nFailed writing sector 0x96.\nTry to fix before reboot!");
         return 1;
@@ -574,7 +574,7 @@ u32 SafeInstallFirmBuffered(const char* path, u32 slots, u8* buffer, u32 bufsiz)
     }
 
     // done, now check the installation
-    ShowString(false, "Checking installation, please wait...");
+    ShowString("Checking installation, please wait...");
     if (fix_sector0x96 && ((ReadNandSectors(sector0x96, 0x96, 1, 0x11, NAND_SYSNAND) != 0) ||
         (ValidateSecretSector(sector0x96) != 0))) {
         ShowPrompt(false, "!THIS IS BAD!\n \nFailed verifying sector 0x96.\nTry to fix before reboot!");
diff --git a/arm9/source/utils/paint9.c b/arm9/source/utils/paint9.c
index 7bedd0c..f40eca8 100644
--- a/arm9/source/utils/paint9.c
+++ b/arm9/source/utils/paint9.c
@@ -116,7 +116,7 @@ u32 Paint9(void) {
         }
     } else DrawStringF(TOP_SCREEN, 10, 10, COLOR_STD_FONT, COLOR_TRANSPARENT, "(" VRAM0_EASTER_BIN " not found)");
     DrawStringF(TOP_SCREEN, SCREEN_WIDTH_TOP - 10 - GetDrawStringWidth(snapstr),
-        SCREEN_HEIGHT - 10 - GetDrawStringHeight(snapstr), COLOR_STD_FONT, COLOR_TRANSPARENT, snapstr);
+        SCREEN_HEIGHT - 10 - GetDrawStringHeight(snapstr), COLOR_STD_FONT, COLOR_TRANSPARENT, "%s", snapstr);
 
     // outline canvas
     DrawRectangle(BOT_SCREEN, 0, 0, 30, SCREEN_HEIGHT, outline_bg);
diff --git a/arm9/source/utils/scripting.c b/arm9/source/utils/scripting.c
index 9cedff4..0740d53 100644
--- a/arm9/source/utils/scripting.c
+++ b/arm9/source/utils/scripting.c
@@ -1679,8 +1679,8 @@ void MemTextView(const char* text, u32 len, char* line0, int off_disp, int lno,
         }
 
         // colorize arrows
-        if (al) DrawStringF(TOP_SCREEN, x_al, y, COLOR_TVOFFS, COLOR_TRANSPARENT, al_str);
-        if (ar) DrawStringF(TOP_SCREEN, x_ar, y, COLOR_TVOFFS, COLOR_TRANSPARENT, ar_str);
+        if (al) DrawStringF(TOP_SCREEN, x_al, y, COLOR_TVOFFS, COLOR_TRANSPARENT, "%s", al_str);
+        if (ar) DrawStringF(TOP_SCREEN, x_ar, y, COLOR_TVOFFS, COLOR_TRANSPARENT, "%s", ar_str);
 
         // advance pointer / line number
         for (char* c = ptr; c < ptr_next; c++) if (*c == '\n') ++nln;
@@ -1702,7 +1702,7 @@ bool MemTextViewer(const char* text, u32 len, u32 start, bool as_script) {
 
     // instructions
     static const char* instr = "Textviewer Controls:\n \n↑↓→←(+R) - Scroll\nR+Y - Toggle wordwrap\nR+X - Goto line #\nB - Exit\n";
-    ShowString(instr);
+    ShowString("%s", instr);
 
     // set script colors
     if (as_script) {
@@ -1743,7 +1743,7 @@ bool MemTextViewer(const char* text, u32 len, u32 start, bool as_script) {
         else if (switched && (pad_state & BUTTON_X)) {
             u64 lnext64 = ShowNumberPrompt(lcurr, "Current line: %i\nEnter new line below.", lcurr);
             if (lnext64 && (lnext64 != (u64) -1)) line0_next = line_seek(text, len, 0, line0, (int) lnext64 - lcurr);
-            ShowString(instr);
+            ShowString("%s", instr);
         } else if (switched && (pad_state & BUTTON_Y)) {
             ww = ww ? 0 : TV_LLEN_DISP;
             line0_next = line_seek(text, len, ww, line0, 0);
@@ -1818,7 +1818,7 @@ bool MemToCViewer(const char* text, u32 len, const char* title) {
             for (; IS_WHITESPACE(*caption); caption++);
             for (; caption[len] != '\n' && caption[len] != '\r'; len++);
             DrawStringF(BOT_SCREEN, x0 + (lvl-1) * (FONT_WIDTH_EXT/2), y0, text_color, COLOR_STD_BG,
-                "%*.*s", len, len, caption);
+                "%*.*s", (int) len, (int) len, caption);
             y0 += FONT_HEIGHT_EXT + (2*TV_VPAD);
         }