Hi all,
apart from system settings ("Configure your Desktop") still freezing sometimes when applying changes I have a funny behaviour of the desktop from time to time:

It's like the desktop moves "over the edge" from time to time. Hitting a screen edge with the mouse puts it back to normal. First it was only in desktop view, lately also maximized windows show this

It sneaked in with KDE 4.5.5 and though re-setting my desktop settings after KDE 4.6.1 update, this one stayed with me. Therefore I guess it's not (only) related to desktop effects. It's not persistant and I couldn't relate it to any action.
Any ideas what to change / delete / reinstall / restore to make this stop?
This is a ThinkPad X61T Core2Duo 1.6, 4GB ram, Intel onboard video.
TIA,
Andreas