I have noticed 2 differences on my machine between the 64 and 32 bit Beta 1 releases:
-32bit has no problem detecting the correct 1360x768 resolution, whereas the 64bit sets the resolution to 1024x768. My monitor is hooked up via DVI, so I would think that this shouldn't be a problem.
-The 64 bit release has no issues with the time setting dialog. The 32bit release seems to be a bit confused over what "system is set to local time" means :-P.
I've seen the clock issue in the past with Ubuntu and Mint as well.