Based on Poser 5 development, I'm guessing it should be pretty stable for most users in 9 months (SR3 or 4). The initial alpha testers were a select group who probably couldn't detect the same bugs that general users would find, and who obviously weren't motivated in the same way the paid beta testers are - to get their money's worth. But assuming the alpha testers did catch some serious bugs, it must have been a real nightmare for some of them, so my sombrero's off to them for their intestinal fortitude.