This has been brought up before, but I've yet to find a solution that works.
I am running AE v10.5.0.253 (CS5.5) on an i7-970 6-core 4.15Ghz with 24GB RAM.
Every time I go to do a RAM Preview, I get the "Background Process Status, Loading Projects..." message in the Info Panel. Every single time. Even if I'm just repeating a render I did seconds ago, so it's entirely cached.
I've tried every combination of options in the MP settings; nothing makes this go away. Only with MP completely OFF does the render start up immediately. Muting audio doesn't help either.
What's odd is that I just downgraded from Lion 10.7.1 back to Snow Leopard 10.6.8 (because of too many issues with QuickTime and coreaudio), and I don't recall having this problem with Lion ... though at the time I was working on a different project.
Is there any way to fix this???
I've never seen that error but I'm really curious about the QT problems you were having. I'm on Lion with no problems yet. You can PM me if you'd like.