[TxMt] yank stopped working

[dmw]

Very recently, yank (C-y) as stopped working for me.  Instead of 
inserting text from the kill ring, it switches focus to the gear button 
on the project drawer.  I don't know what I've done to cause this 
change.  I thought it might have been TextExpander, but the problem 
persists after uninstalling it.  There is no mapping set for C-y in the 
keyboard pref pane.  C-y works in other Cocoa apps.

I would much appreciate any troubleshooting suggestions.

Mac OS X 10.5.1 Intel
TextMate 1.5.7 (1436)

Thanks.