Oh I don't know, I've never had any problems with the items in the "Crappy old notes" folder - the contents of which are constantly being referred to. On the other hand it frequently craps itself at the contents of the "Final Draft" folder which contains the files I never go near because... well.. they're finished.
At this stage I'm so goddamned paranoid about it that I mail myself anything thats changed at the end of the day, so I essentially have a version control system running on my email, but last night it crapped out after a couple of hours and just before I mailed it. Pain in the hole, but its fixed now. Its just aggravating that I spent an hour yelling at the PC instead of finishing up the section I was rather happy with.