This is 100% reproduced when you switch keyboard layout in quick class search (Ctrl+N). Also in intellij idea 13.
Something like:
- Open quick search menu when keyboard is not in English layout (Russian e.g.)
- Type anything
- Switch to English
- Congratulations! you stuck in russian layout 🙂 restart your intellij idea!
When I ceased to switch layout in search, I forgot about this problem.
UPD: it’s suitable for most part of text inputs (even for search and file creation)