No problems with P6 from the word go, and still haven't dl/ed the SR1. Many of the problems i see are from conflicting program errors, or running P6 on a machine that seems awesome but wasn't intended for computer graphics of any kind, especially the 3D type. Just make sure P6 is the prodominant program running first off. It happens, where i got a thousand programs running while using P6, though i dont have problems, i did with P4, would lock up if i so much breathed on my old comp just to check the time LOL.