I've crashed TWICE in thirty minutes because of this "stutter bug" and its really annoying me. Tell me, how do you expect me to enjoy playing Episode Two if I constantly crash?
Happens to me still sometimes with 2Gb of PC3200... There's no escaping it, you can only ward it off with defragging, turning off autosaves, and maybe also taking steps to reduce heat (in case it's also linked to an overheating isue).