[Bug 3348] New: License agreement garbled after scrolling

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=3348

Summary: License agreement garbled after scrolling
           Product: Wine
           Version: 20050830
          Platform: Other
               URL: http://toolbar.google.com/picasa/picasa2-setup-1884.exe
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: wine-user
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

I'm running 20050830 compiled from the tarball, with a couple
patches from Mike M.
(http://www.winehq.org/pipermail/wine-patches/2005-September/020605.html,
http://www.winehq.org/pipermail/wine-devel/2005-September/040024.html)

The installer for Picasa has obvious screen update
glitches when scrolling up and down using the scrollbar.
(Keyboard scrolling seems better.)

To reproduce:
1. wget http://toolbar.google.com/picasa/picasa2-setup-1884.exe
2. wine picasa2-setup-1884.exe
3. click on down arrow at bottom of scrollbar on right of license text window

The old area of the window is ok, but the newly drawn area
at the bottom is screwed up significantly.

4. click on up arrow

Again, the old area looks ok, but the newly drawn area at
the top is screwed up significantly.

This should be an easy one to fix.  Any takers?