I upgraded the drivers as I was in need of updating, plus to improve on the performance and stability of certain games I have (Colin McRae Dirt, along with various recent games). I tried changing the two OpenGL options in ATI Catalyst Control Centre (Triple Buffering & Force 24-bit Z-buffer depth), but both of them don't help in any way as both screens remain greyed out. Is it possible that the windows aren't initialising properly under these drivers? Either something to do with the coding or with the drivers themselves, or a bit of both that have caused these problems... I dunno what I can do to test Terragen 2 as to see what is exactly going on, but it seems to me like the windows are frozen and not updating. Well, I'm not going to use a previous driver any time soon, but I'll wait and see what the next drivers will do. I could send some feedback to ATI to see if anything can be done, but I haven't seen any other forum posts with the same problem, so I don't know if its just me or not. Would be more helpful if more people with similar hardware or OS would leave feedback really...