Someone reported the same problem and he's not using compiz. He is using fglrx, as am I. So I'm reopening. In the forums he says:
thomascj: I'm having the exact same problem, and I'm not running xgl, or compiz fusion. I am, however, running fglrx. Turning off keyboard repeat fixed it -- but I do use the terminal and it really sucks having to press backspace that many times... Anyone else fixed this problem?
Someone reported the same problem and he's not using compiz. He is using fglrx, as am I. So I'm reopening. In the forums he says:
thomascj: I'm having the exact same problem, and I'm not running xgl, or compiz fusion. I am, however, running fglrx. Turning off keyboard repeat fixed it -- but I do use the terminal and it really sucks having to press backspace that many times... Anyone else fixed this problem?
Taken from: http:// ubuntuforums. org/showthread. php?t=432057& page=2
By the way, canceling key repeat and lowering key repeat rate seem to be a good workarounds for now.