"Dan Kegel" dank@kegel.com wrote:
The problem in Wine is that the bottom window ends up blank. The sequence appears to be: erase bottom window, draw right values for bottom window client areas but not frames, erase bottom window. On Windows, it seems to continue after that with: draw right values for client areas again, then draw frames. Those last two bits are missing in Wine.
Accidentally, I'm debugging painting bugs in one of my apps, but your case seems to be a different one. Attached patch makes your app happy, but since I'm not sure that this is a right fix, I'm not sending it to wine-patches.