Cursor AI edits corrupt Windows-1252 encoding in C++ projects (even when editor shows 1252)

[deanrie]

Hey, thanks for the detailed report.

Related threads:

• AI edits corrupt non-UTF-8 characters (€ symbol becomes ? in Windows-1252 files)
• Search_replace tool corrupts ANSI/Windows-1252 encoding
• Cursor returns UTF-8 code despite Windows-1252 configuration

What definitely DOESN’T work (other users tried it):

• Manual “Reopen/Save with Encoding”
  • The corruption already happened on the server before the diff came back to the editor
• User rules in .cursorrules
  • Doesn’t help because the corruption happens in the apply pipeline, not in the prompt
• files.encoding settings and .editorconfig
  • They get ignored

What works right now:
Downgrade to version 2.3.41 from Download · Cursor and turn off auto-update. A few users in the threads above confirmed the issue doesn’t reproduce on 2.3.x.