I've run into an odd problem. It's very intermittent, so I'm having a hard time determining what causes it.
Basically, after working in VS2005 for some time, I'll try to do something like insert a constructor with ALT+INSERT. The menu pops up with all the normal choices, but the menu itself is disabled. Not the individual menu entries, the menu itself. Clicking on entries does nothing, the cursor keys don't move the menu selector. ESC does close the menu, but that's all.
The only solution is to close and restart VS2005.
I'm using build 249.