Using Firefox 7.0.1 on a Mac (OS 10.6.8) the following behaviour is reproducible:
- Select some text in chat.
- Type command-C to copy it
- this causes a 'c' to appear in the chat input area
Type command-V to paste it
this results in the following being pasted:
(*) TeX, LaTeX and Friends | chat.stackexchange.com http://chat.stackexchange.com/rooms/<some chat room>
If I explicitly use the Edit menu instead of the keystroke, the text copies correctly.
The same issue arises in Safari 5.0.3, but not in Safari 5.1.
Note: this has nothing to do with keyboard layout.