can't resize, drag, or move any program window on my Ubuntu

[david]

Hi and thanks,
   I tried to install compiz. It didn't work, so I got rid of it. The 
problem now is that I can't resize, drag, or move any program window on 
my Ubuntu desktop. KDE desktop still works fine. I'm sure there's some 
configuration file that I should change, but I don't know which one or 
even where to find the files. It doesn't show up as a bug so there's no 
report to ask about or attach.
David