When typing in a form or something in MS Internet Explorer 6, sometimes the input will change to all-caps (even the numbers are shifted to symbols). The keyboard caps lock key is not depressed, and I can type normally in other applications (Notepad, etc.).

Recently, both my WinXP PCs (work and home) have been having this weird problem, so it's not the keyboard itself. Maybe it has something to do with a Windows Update patch.

Anyway, has anybody else had this problem? How can I fix it (telling me to use another browser doesn't count as a fix)?