After launching some full-screen game, all windows in my desktop are repositioned such that the window title bars (which have the title and -+x buttons) lie outside of the visible area - that is, they are moved to e.g. the top of the screen, up to the position in which the title bar gets cut off, and will show up again when dragged a bit down.

Steps to reproduce:
- Launch several applications with non-maximized windows, position them around the desktop.
- Launch some full-screen application with the same resolution as the desktop (e.g. FreeDoom).
- Close said application.

Expected behavior: application windows should remain where they were.

Actual behavior: application windows move a bit off the screen, right at the position in which the title bar is not visible anymore.