In my case, the Render Manager is blank so I guess it has lost track. In general, is it okay to delete all -FIN- files from your hard drive? I mean so long as you save the project file, you can always re-render, correct?
Is Black Magic Standard a good option, or can I achieve the same result by hooking the monitor to the s-video connection on the camera connected to my G5 via firewire?
I have a similar configuration, less the raid and the Black Magic card, and do not seem to have the same problem. How much memory do you have, and is the memory from Apple. I assume you have tried different quality settings for the time line. Are you using any effects or transitions. Have you talked to the Black Magic people?