Here's more info I posted in a more...um....whacky thread:
I get movies all the time in Logic. If I use plugins things start sounding time/phase drifted. Different frequencies drifting in time and the phase getting whacky. EQ's/De-essers/Oxford/Waves/ProTool$/Logic different DAE memory allocations - still creeps up. Depending on the amount of compression in the movie and at certain parts of the movie multiplied by how many instances I have will yield different results. All of it a moving target.
NONE of it reproducible on a consistent basis! Three different G4's (Silver Mirror - ram maxed), G5's (ram maxed) Mix+, HD 44.1 48, and 88 worse at 96K! Some days after a fresh boot you don't hear it. The ol' cntrl/optn/p/r reboot on the OS 9.22 machines won't clear it.
As the movie loops (& potential memory holes develop) the problem slowly shows up. But I don't think it's ram frag. It's so damned subtle it's impossible to track. Changed all the clocks/termination/cables/sources of clocks etc... Same results. Mostly. Mostly.
I've talked to roundbadge about this once and the issue I believe is PROCESSOR LAG!
It's what drove me to GearSlutz & to start reacquiring the hardware gear again. I'm STILL tuning the room thinking THAT could have been it. Headphones - same result. Mostly.
Plug-ins suck. Mostly. Sorry. They do. I'll start another thread on this. 