Konstantin:
I have a problem in FC6: Every so often, usually while I'm using Firefox (Swiftfox 2.0.0.4 if it matters), the keyboard stops responding completely. And not just for firefox - it doesn't work anywhere in X (KDE 3.5.6, btw). The only solution is to use the mouse (!) to log out, at which point keyboard starts working again.
Just yesterday, I had (what seems like) the same experience. I was on mapquest, trying to enter an address, and nothing was showing. A couple times, I clicked on the text field - didn't help. It did resume proper operation after about 10 seconds.
I have a mostly stock F7 (not religiously updated).
