http://bugs.winehq.org/show_bug.cgi?id=22369
a.m.winehq@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- Component|-unknown |user32
--- Comment #6 from a.m.winehq@gmail.com 2010-04-17 00:27:27 --- A child window that is not an MDI window is also moved and resized. As a result, the MDI child windows are tiled with the wrong size.
In case of Native Windows, it works properly.