Nice you guys are focusing on improving performance, especially audio, well done. I think the audio stutter got a bit better, not nearly as noticable indoors on Grain Elevator and Station as before.
However, getting serious hang-ups that weren't there before, the game just locks up for 1 sec at a time. Sometimes it happens a lot, I just came off Pavlovs and it was hanging like mad, very annoying.
Windows 7 Professional
Intel(R) Core(TM)2 Quad CPU Q9550 @ 2.83GHz
8192 MBytes DDR3 @ 667 Mhz
NVIDIA GeForce GTX 580
Creative SB X-Fi