Couple of years ago I had Compiz installed then it all changed and now I am fully updated to PcLinux2010 KDE4 but I really miss the cool graphics of Compiz (now Compiz-Fusion).
You have enabled Desktop Effects in KDE CC - Workspace Appearance & Behaviour?
Have you adjusted the vaious effects available in the 'All Effects' tab?
Years ago I ran Compiz & Beryl but have found the native KDE4 effects just as good and even better.
Just a suggestion in case you missed it is all
