You may be right Paul, however at least one of my problems (the crashing of the 32-bit server upon loading a cubase project) appeared only in the latest build so may not be entirely XP64 related. Karel said he could not get VEP32 to crash following my repro, but perhaps he wasn't testing in XP64?
W7 isn't released for another week, and many musicians using PCs have leapfrogged Vista for many well documented reasons, so W7 isn't a realistic option right now. Soon though!
Brett