Yeah, I know that frames are safer than AVIs, but surely you need more space to store them right? So if you want to chance rendering an AVI, there is a way to minimize the risk. As I was working on my last project, it started seeming like Poser's bugs were much more predictable than I first thought. When I tried rendering an AVI it would always lock up somewhere between 90 to 100 frames on this particular scene. I assumed this was because the leak was always consuming the same resources (I wasn't running anything else at the time on my 512MB machine). At no time did this scene lock up when rendering the smaller AVIs. Just render the scene a couple times, find the general spot in the movie where it locks and then break the movie up into slightly shorter segments.