maybe it's just dumb luck, but avast 5.0 seems to be working well on my windows 7 X64 machine. i have been keeping close track of the problems it has been having on this forum, and i am hoping that a new program update will be released soon. i think i have been very lucky. i also tried many of the recent betas during beta testing, and again, i had no problems with them either. the only security software i am running is windows defender without the on access scanning, and avast 5.0. 377.
i think i may have been very very lucky so far. i am keeping my fingers crossed that a new update will be released soon.