SR6? Depends on how you want to count them. First, we had SR1, then six SR2 betas before the official SR2.1.

Many bugs were fixed, a few more things were broken, a couple of new features were added, the much-despised Interlok security was removed, Legume fathered Victoria's illegitimate love-child, general improvements were made in speed and stability across the board, etc. Visit the Beta forum for all the sordid soap-opera details.

Some users are still experiencing stability problems. I have a nagging suspicion that Poser 5 has compatibility issues with certain combinations of hardware, software, and/or drivers, which might explain why the application is running smoothly for some of us and not for others.