VBox 4.3.40 with VBEMP, ReactOS inbuilt Mesa
tested on ross gcc dbg builds:
0.4.10-dev-550-gc97e9de affected (after Thomas two D3D patches)
0.4.10-dev-548-g9bffdcb affected (before Thomas two D3D patches)
ReactOS 0.4.9official release was not affected yet, 0.4.8official release was not affected yet (both were still based on WineD3D 3.0)
Open dxdiag and let it complete the DirectDraw selftest, watch carefully when it wants to draw in fullscreen
It should be able to draw in fullscreen and when it finishes it should properly restore the desktop resolution (of 800x600 in my case), no black bars should surround the desktop area
DxDiag will crash when trying to paint in fullscreen.
(When it finishes, it will not properly restore desktop, the desktop area is limited to something like 640x480. The rest is filled with black colour.
The user can fix this state by changing the desktop resolution via desk.cpl manually afterwards.)
Sidenote: applications like Diablo II are affected from this as well and crash in fullscreen now.