do not know… 
The bounding box problem could well be causing it.. Try scaling that sucker down and see if it helps.
Do you know if its one specific machine that is messing the frames up? You should be able to tell in the BB queue manager??
Hi DaForce, the frame flicking is random… thats the thing that makes this quite a mystery. What makes even stranger is that it can be stable for several 100 frames, but when it first starts it escalates…
very strange indeed. :shock:
Have you tried scaling the scene down yet?