I had the same problems on my Windows machines so I switched over to the OS X version and haven’t had an issue at all (apart from horrid render times).
So one solution is run the SA version on a high end MacPro.
My main MAC = 2 x 3 GHz Quad-Core | 8 Gb | 4 x 500 striped RAID.
I would like to find a better rendering solution though.
Hope that helps.