I didn't get a BSOD in W7x64, but Programs and Features hung when I tried to uninstall the beta and I had to go to Safe mode to actually do the uninstall. No further problems after that, but I have just been installing RCs over the stable program.
okay, thanks for the feedback. I actually also installed the RC today, and considering that the setup would use the default Opera program folders again (as opposed to Opera11 alpha/beta), I decided to uninstall first; but yeah I didn't want to risk a BSOD again and as usual when I remove Opera 11, I do it in safe mode.
Now the thing is I don't feel like testing that anymore, I've had about 5 or 6 BSOD's with the alphas and the betas of Opera when uninstalling them in Windows "normal mde" (testing version after version), and exclusively when Avast (5.0 as well as 5.1) was installed. And one thing I can tell, you don't play with no risk with blue screens, after a while, your system breaks... I'm only saying it intuitively, I know that it tells: "to avoid further damage to your system etc...", but after a couple of blue screens, I started to have bad Windows issues all over the place (refusing to copy files among other things)... the OS became unusable, lagging... and I had to re-install.
So I'm not ready to take the risk with the RC... I sent a memory dump to Avast already and never had any feedback...hmm okay... I'll try it one last time and report back in a few minutes