suppose you test the configurations with daw and virus control installed - only those two. in normal working conditions lots of plug-ins may influence each other, i had this situation some time ago and i discovered (by installing the brand new system and later all the components one by one) that it was the driver of the master keyboard that messed up.
so... only beta testing by users in their real configurations may give you an answer of whether the software is fine or still buggy...
Actually we do have other software and plug ins installed on our test systems to mimic real life situations.
Still we didnt get any crashes of Logic using the current Public Beta.
Please send detailed information about the systems that exhibit these kind of problems to our support hotline.