Die K Desktopumgebung

14.8 How can I get backspace to work under KDE?

Try running xmodmap -e 'keycode 22 = BackSpace' and see if that fixes it (apps will have to be restarted for that to take effect). You should be able to just stick that in your X startup files like $HOME/.xinitrc.

Or simply upgrade to XFree86-3.3.3.1-1 and above.

Also, concerning the "Backspace"-Bug (Bug number: kb704): the bug is fixed somehow by putting the following line into $HOME/.xinitrc:
 xmodmap -  "keysym Delete = BackSpace"