Hi I'm running 7232 x64 and I just tried alt-tab. It appears for a millisecond and then start to flicker incredibly fast.
This is not a function I use much so I just found out since you mentioned it.
I don't get any problems with the aeropeek previews on the task bar. They display perfectly when I mouse over them also aero flip is working fine.
The alt-tab problem is no deal breaker for me and I'm very pleased with 7232.
Just a bit annoying but no biggie.
Have you just noticed it or has it always done that?
ps. Oh, and a very warm welcome to the forum