Version: (using Devel) Installed from: Compiled sources When switching off my second head with xrandr --output VGA --off all the windows that were on that monitor stay outside of the then-visible area and are hence totally inaccessible. This worked fine when trunk/ was still KDE 4.2.0 but has been broken sometime after the release (i.e. in the last 2-3 months).
I can confirm the same happens when switching between 2 screen and single screen using nvidia twinview with xinerama. I believe that when using 4.2.x this problem didn't exist but began when I upgraded to 4.3.0. I'm using gentoo.
I can verify this behavior for ATI Radeon (RV350) also, with Xorg 'radeon' driver. openSUSE 11.1, KDE 4.3.1 (KDE 4.3.1) "release 168"
*** This bug has been marked as a duplicate of bug 185103 ***