[Bug 19360] New: Medieval 2: Total War loading screens turn black when progress bar moves

http://bugs.winehq.org/show_bug.cgi?id=19360

Summary: Medieval 2: Total War loading screens turn black when
                    progress bar moves
           Product: Wine
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

Created an attachment (id=22427)
 --> (http://bugs.winehq.org/attachment.cgi?id=22427)
Console output from Medieval 2: Total War Demo

See the summary - the loading screen background appears but as soon as the
progress bar begins to animate, it vanishes.

I've attached a log generated from the demo (both the demo and actual game
suffer this) which might contain useful output.