[Bug 6006] incorrect paint of invisible buttons

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=6006

------- Additional Comments From [e-mail]  2007-18-05 00:17 -------
Created an attachment (id=6339)
 --> (http://bugs.winehq.org/attachment.cgi?id=6339&action=view)
Image of display glitches

Any other developers have an idea on where to look to find the problem in the
code?  See attached image for what it looks like, with red X's for where there
are problems.
I've looked at it quite a bit and can't seem to find it.
The problem areas are those where child windows are hidden, and the window just
can't seem to clean itself under those invisible child windows.