Reproduce the bug:
I've test it on i865GV 1440x900, XP, rotated 90". Both DirectX & OpenGL mode was impacted.
The view area will adjusted a little bit, as if it's trying to enter full-screen mode.
However the menubar and system taskbar doesn't disappear.
And the view never repaint or update, but I beleave the view is responding to customer input.
Because I can still return to normal view by pressing F11.