I'm running Etch with a standard laptop install. I normally use KDE desktop, yesterday I noticed my "c" key stopped working in KDE. For troubleshooting I tried my windoze hard drive which it works fine in. It also works in KDM and also Gnome, which I'm writing this from. I tried an apt-get dist-upgrade last night with no help. I've look in KDE for the keyboard setting but haven't found anything. I've also tried an apt-get install xserver-xorg-key* hoping to find a keyboard map but that didn't produce anything.
Does anybody have any ideas as to where to go next?

You might want to try to clean the keys in your keyboard.

Thanks for the idea but; my only issue with cleaning it, is that it works in everything else but KDE. I really don't feel it's a hardware issue.