[Bug 20865] Steam login window jumps around the screen when moved

http://bugs.winehq.org/show_bug.cgi?id=20865

--- Comment #30 from Austin Lund   2010-06-22 17:49:13 ---
(In reply to comment #26)
> Looks like the trigger for this bug to happens with Steam is due to Steam uses
> undecorated windows and tries to manage the window moves itself. Don't know if
> this proves the discussion related to the causes of the bug or contradicts with
> them.

The test program which is attached does recreate how Steam's login window
handles things.  Note that what you are saying is exactly what happens.