[Floh] “Is this a complex program (many layers), and does it use the Media 100 i codec? There have been some changes on how Media 100 i codec is handled in 10.1 vs 10.0, which could need more CPU power per clip/track than in V10.0.”
No – this is as simple as it gets. 1 video track, no titles in either a SD format or 1080iHD, 1 audio track. I thought that maybe a 100i file could be the problem, so I tried the SD and the HD test. And if the system should be able to deal with an 1080HD clip, why would a 100i clip trip it up? And like I said – these and much more complex programs worked fine in 10.0 on the exact same computer (other than the funky color and set-up problems with a 100i legacy clip).
Anyway, it’s got us scratching our heads. Maybe a software conflict with something else in our system- FCP, Compressor, DVDStudioPro, After Effects? (by the way, we are running OSX 10.3.8 ).
Still waiting to hear from Media100 Tech support.