I just installed build 3540 and upgraded my 3.0 VM. The upgrade and tools installation completed without any problems. No more of the BSOD cycling that plagued previous builds! Networking and folder sharing work great and CPU usage is much lower than 3.0.
Where did you get 3540 Where did you get build 3540 - I thought there was only 3522. Is the new build without the "craziness" of the build released on 9 Nov 08?
It was posted today under Announcements and fixes a number of the BSOD errors. http://forum.parallels.com/showthread.php?t=31765