I've programmed some Open GL stuff, and I've got to you tell that these issues ARE 'card issues' within certain limits.

The point of OGL was supposed to be a non-platform-specific API to allow programmers to write code according to a set of PD standards and be sure of it running correctly on any supporting OS. The card manufacturers were the first to screw this idea up by issuing their own modified versions, to to optimise for their chipsets. Then Apple decided to add some mods for the Mac OS, Microsoft responded with a few more mods and...

So now we've got a cross platform standard that isn't even standard on a single platform. It may be naiive of a developer to try and 'do it by the book' and expect it to work, but if you don't have infinite resources, where else can you start?

John

PS Surprised you've had problems with ATI, they're about the best at following the specs.