OK, thanks, Edward. I performed both of your suggestions with the following results:
1. Using the Invigorator Renderer rather than High-Quality OpenGL. That works, whether or not QuickTime is in Safe GDI more only, or DirectX enabled.
2. Using the HQ-OpenGL renderer does not work; no frames are shown in the window while rendering and the finished product plays in QT as nothng but a black screen – with one exception: the first frame (which in my case has only the edge of some text on it) shows something but all subsequent frames are black.
3. Setting QuickTime to Safe Mode (GDI only) or DirectX had no bearing on the results, regardless which Renderer is used.
Thanks for your tips – the programmer in me is curious why the OpenGL renderer doesn’t work, though. Any thoughts?
Lee