http://bugs.winehq.org/show_bug.cgi?id=16716
--- Comment #4 from Rpnpif rpnpif@free.fr 2010-07-24 04:02:41 --- This issue is still in wine 1.2.1 but after some action (sometimes put the mouse cursor over an icon with tooltip or resizing a child window to the waximum) the principal window is automatically resized removing the unrefreshed zone. Well.
So now the bug is not always present, just some second or more if no action is done. Perhaps, some algorithm adjustment should accelerate the removing of the not refreshed zone or, perhaps the best, to forbid the increasing of the size of a window that is already at the maximum size allowed by Flowcode.