Have a dual screen setup with two panels/instances of the taskbar. I have both set to only show items from the current screen. Occasionally when minimizing, the window animation will either minimize to the wrong screen or to neither taskbar (just minimize to the center of the screen). This effect will disappear if the screen is first maximized in the second screen then moved back to the first. Using KDE 4.8.1.
same thing: advertising a wrong position for the task *** This bug has been marked as a duplicate of bug 242772 ***