Quote Originally Posted by samsc View Post
its possible that an apple operation system update might have changed or altered supported resolutions -

i cannot get 6 outputs from my triple heads on leopard.
Right after Apple released the graphics update, I was able to hack a core graphics library to make two TH2G devices work. It ran 6x1024x768 but was useless for anything else but Catalyst. I finally re-imaged the disk as it was nothing more than an experiment that had no promising results.

Incidentally, the core video and core graphics will work just fine. The problem has to do with limitations in the way Quartz renders on the specific GPU. This is something rumored to be fixed (accounted for actually) with the release of snow leopard.