[Bug 12352] New: application windows shrink to a small square on desktop switch

http://bugs.winehq.org/show_bug.cgi?id=12352

Summary: application windows shrink to a small square on desktop
                    switch
           Product: Wine
           Version: CVS/GIT
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Keywords: regression
          Severity: major
          Priority: P2
         Component: winex11.drv
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]
                CC: [e-mail]

I'm on KDE 3.5.2. With the latest wine-git, when I switch to another desktop
and back, many applications (especially installers) shrink down to a small
(about 32x32) window. Many of these windows cannot be resized.

To reproduce:
1. run winecfg on desktop 1
2. switch to another desktop
3. switch back to desktop 1

git bisect says:

f41e2339b73eb624e5d3136ef9b4fe6c38ed3843 is first bad commit
commit f41e2339b73eb624e5d3136ef9b4fe6c38ed3843
Author: Alexandre Julliard 
Date:   Wed Apr 2 16:57:17 2008 +0200

winex11: Allow mapping/unmapping a window even while processing another
event.