Rendering Bugs in several windows on Vista

Hello,

I've stumbled about a rendering issue that is recreated by resizing some
windows. Black blocks and shifting of controls appears to happen though they
are just rendered at a wrong position or some client area isn't redrawn and
thus suffers from blitting wrong portions of the window. This specifically
happens _only_ if one resizes not at the bottom, right or bottom right
handles but at the upper, left, upper left, upper right or bottom left
resize handles. The result is shown in the attached screenshot; I apoligize
for the quality but getting a JPEG under 10k to look nice is hard with much
of text in it ;)
Otherwise there are better images to be found at
  http://www.informatik.uni-rostock.de/~jr252/temp/TortoiseSVN_Commit.png
  http://www.informatik.uni-rostock.de/~jr252/temp/TortoiseSVN_Update.png

I successfully made this happen in the following windows and dialogs:
    Progress window (used for status messages of Commit, Update, Revert and
Unlock operations; might be used for other things as well)
    Show Log
    Statistics
    Repo Browser
    Check for Modifications
    Resolve dialog
    Revert dialog
    Get Lock
    Recent Messages window (when clicking on 'Recent messages' in Commit
dialog)
    Switch to Branch/Tag
    Add
    Create Patch
    Properties
    Add properties

The following windows and dialogs flicker but redraw themselves properly
after the flickering:
    Commit dialog

It's possible I've overlooked windows but I hope I found all.

I tried this with Windows Vista Business with the Aero User Interface turned
on. It does not occur when switching to the Windows Vista Classic or Windows
Vista Basic User Interfaces which leads me to the assumption this won't
happen in Windows XP or 2000 either.

Regards,
Johannes Rössel

P.S.: I'd like to ask that answers to this report will be forwarded to my
E-Mail address as well since I am not subscribed to the mailing list.
Thanks.

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