I reinstalled Wine recently (latest version from winehq.com repo) and now I have a very strange problem:

It works as usual and I can run regular programs and see the menus and buttons, etc.

But games will just show a black window. For example when I run Cave Story in windowed mode, I can hear the sound and see the menu bar, but the part where the actual game should be visible is just black. Same goes for all other games I tried. (maybe this has something to do with DirectDraw/Overlay?)

I'm using a Radeon x1300 with the latest Ati drivers.

If anybody has an idea how I can fix this, I'd be very happy!