[Bug 7287] New: WINE shows redundant "tabs" with tabbed MDI

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=7287

Summary: WINE shows redundant "tabs" with tabbed MDI
           Product: Wine
           Version: 0.9.30.
          Platform: Other
        OS/Version: other
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: wine-binary
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

I am using a software that uses MDI and that creates a tab for each document.
When documents are minimized, redundant tabs start to appear.  If I click on
them, I get weird windows with no proper frame and nothing inside (typically all
white or all blue)...

This is a regression with regard to old versions of wine (I would not be able to
precisely say how old).  In fact, the software that I am using (namely SWCADIII)
was originally developed to be wine-friendly (including about-wine information
when run under wine) and used to work glitch-less with wine.

To test and reproduce, SWCADIII can be downloaded free at
http://www.linear.com/designtools/softwareRegistration.jsp (note that no
registration is in fact required)...

Open a new sample schematic (many are included in the software)
Start a simulation using the simulation button
Select some output signal to plot in order to get a waveform document
[With this you trigger MDI on... there are now 2 documents: a schematic (named
something.asc) one and a plot one (something.raw)]
Now minimize the two windows
[you should notice the first glitch: icons for the two documents appear one on
top of the other... not a big issue]
Now remaximize the documents... spurios tabs appear.