[Bug 12353] New: The Bat! main window disappears on load, program keeps running in tray

http://bugs.winehq.org/show_bug.cgi?id=12353

Summary: The Bat! main window disappears on load, program keeps
                    running in tray
           Product: Wine
           Version: CVS/GIT
          Platform: Other
        OS/Version: other
            Status: UNCONFIRMED
          Severity: major
          Priority: P2
         Component: winex11.drv
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

Recently WINE broke The Bat! (mail application) by making it absolutely
impossible to use: as soon as the program loads, its main window disappears,
and it's impossible to bring it back. If the program is configured to always
keep its icon in the system tray, it's still possbile to access a very minimal
set of functions from it (e.g. it's possible to shut down the program without
killing it).

Git bisect shows the bug to be caused by commit
cb3ff54789c652b02d852f40db71cafd9fd67ca9