[Bug 31502] New: Dota 2: switching focus from game corrupts it

http://bugs.winehq.org/show_bug.cgi?id=31502

Bug #: 31502
           Summary: Dota 2: switching focus from game corrupts it
           Product: Wine
           Version: 1.5.11
          Platform: x86-64
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: minor
          Priority: P2
         Component: -unknown
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]
    Classification: Unclassified

Created attachment 41415
  --> http://bugs.winehq.org/attachment.cgi?id=41415
Game gets corrupted after alt-tab

Repro:
1. Launch game
2. Alt-tab out of it

Result:
Viewable area shrinks, showing just small rectangle in the center of the
screen. Game freezes, at least visually (image within this rectangle doesn't
update). See attached screenshot.

Expected:
No game corruption.

Note:
This could be gnome3-specific bug. Using virtual desktop works around it
perfectly fine.