I've a fresh kubuntu 6.06 final and also for me it happens the "corruption". I've a nvidia 6600gt with nvidia-glx driver.
I've done a switch user leaving mine open, and then back to mine, after some seconds computer crashed at all with a black screen and some artifact! No mouse and keyboard! -- KDM detected memory corruption https://launchpad.net/bugs/47455 -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs