Upgrade from 7229 to 7264 only somewhat successful
Yesterday I upgraded 7229 x64 to 7264 x64 by doing the upgrade in compatability mode.
It worked, but the computer was very sluggish. All my apps worked, but not much fun - I had gotten used to having a zippy computer.
Then BSOD (In retrospect probably not related to the upgrade) when waking from sleep when media center is active. Repeatable every time.
I then decided to bite the bullet and do a clean install.
Every was much faster (even faster than 7229). There was joy in the world - at least until the machine BSODed when waking with media center active.
I think this problem is unrelated the upgrade. Having said that, I do not recommend the upgrade as overall performance was not good.