I downloaded the LinuxMCE Beta 3 amd64 DVD (3.9 gig) in 8 hours. I did not upgrade, I did a clean Install. It was very quick. All my display issues with the Video and Audio Media player options are fixed. The video display is more stable. I can still see a tear but it is occasional now rather than persistent. I chose 720P DVI without transparent masking.
A nice new feature is the Screen savers ability to allow you to choose the pictures that are displayed.
With multiple MD's installed it appears faster, snappy.
I do have a problem I probably created. IF you are in the US choose Myth TV, do not choose VDR. You get only one choice. At the present time if you run the wizard to try to choose Myth after choosing VDR it will break something and VDR will have issues.