Hi I don't know how to cure this issue (on potato x86, xserver-svga):
When numlock, capslock or scrolllock are pressed, Ctrl key sequences output something like <dc3> control char representations in nedit (smotif linked, I believe) instead of executing like usual. Under Xpmac in linuxppc that's not the case, the *lock keys act as usual and don't disturb Ctrl sequences. Thx Christian.