Out of the blue about a month ago the VS 2003 and 2005 IDE stopped
recognizing Ctrl-F3 and Ctrl-F4.

I looked in the Keyboard Settings and found the Ctrl-F3 was indeed
still mapped to Edit.FindNextSelected, but what is odd is that if I
removed that mapping and then attempted to readd the exact same key
sequence VS does not even recognize the key sequence!!! It does not
show up in the "Press Shortcut Keys" dialog. I am having this problem
in VS.Net 2003 and 2005. I've tried restarting the IDE, restarting the
machine, and I am considering reinstalling the IDE unless someone can
help.

My keyboard is working fine because the keyboard shortcut for
Edit.FindPreviousSelected (Ctrl-Shift-F3) works perfectly fine and is
recognized in the "Press Shortcut Keys" dialog.

I've tried resetting my user settings in 2005 by running devenv.exe
/resetusersettings but that didn't solve the problem.

Any thoughts?