I've recently been trying a few full screen games that all have the same issue, the graphics on full screen are just totally trashed, this happens with Pushover SDL version, ScummVM and a MorphOS diskmag I tried, the result is as shown in this image;
http://i.imgur.com/RvhAZ.jpg
I see it is running on an SDL screen, if I right click on the depth gadget from Ambient I can see the small preview and the screen looks ok in there, switching to it = bad corruption, is this an SDL setting or something else I need to do? If I configure SDL to run on Ambient in a window they work fine, but I want to play them full screen.
Running 2.7 on Mac Mini 1,5mhz G4 64mb vram and 1gig RAM.