Version: (using KDE 4.2.0)
Installed from: Ubuntu Packages
Everytime I open any window, I see a very unpleasant image that seems like an error. It is hard to explain, I will try: Remember in old linux times, when your video card was not detected, and you could only see lots of rows, lines and colors, and nothing else? well, something like that happens when any new window is opened, but it only last one or two seconds.
I leave you a link to my blog with few screenshots:
Kde version 4.2.0
*** This bug has been marked as a duplicate of bug 170462 ***