I'm a user who started fresh with P5, having not used Poser since version 3 in the Metacreations days. I'm also a pretty avid PC gamer, and I tend to do fresh O/S installs about every 8 months or so (i.e. wipe the system clean and reinstall). I check all Drivers for updates at least monthly, which is really pretty safe now that WinXP has those nifty system restore points. I do not leave my machine running when not in use, so long-term memory management foibles in WinXP are not an issue. I manage my Startup items pretty carefully and keep the crap in the system tray to a bare minimum. All that said, I have never had Poser 5 crash on me. It comes across as a very stable piece of software. I have definite complaints about some of the "ergonomics", especially about the size and finicky "feel" of parameter dials, but I also suspect that I don't know all the tricks yet. I also rarely have anything particularly taxing running alongside Poser, I'm not much of a multi-tasker. I'm currently running an Atlon XP 2800+ (Barton) on an Asus A7N8XD with 1MB PC2700, O/S is WinXp Home. Just based on years of experience with software releases, patches, etc. in the gaming world, I'm betting that people's problems with P5 are going to be as individual and varied as they are. Usually, the biggest problem is that the software developer low-balls their "minimum system requirements" in order to keep the broadest possible potential customer base. Given the functionality of Poser 5 and comparing it to the prices of other 3D programs out there, I can't help but believe this is some pretty good bang-for-the-buck. - Drew