@asymetrix
Superfrog works perfectly, it was the game I most frequently tested. I think you know why :-D
And it was a pain in the a** to get it working correctly, usage of sprites in this game is really weird (and very similar to other Team17 games) and doesn't conform to description in the AHRM.
There was also an issue with horizontal overscan: when right display window border was set very close to its limit the normally invisible part of the horizontal display window wasn't hidden at all. Project X also had similar problem.