I have discovered, to my chagrin the fact that OS X.7.2, a.k.a. Lion, has serious flaws.
First it freezes on Safari. Suddenly a single window within Safari becomes utterly non-responsive. Any text you've typed cannot be edited and a post cannot be completed. Checking the web, it gets worse and affects other web browsers, too. at it's worse it freezes the entire computer and a hard restart is needed, sometimes reinstalling of software. UGH!
Some folk think that there may be a hidden control panel that can't be closed, but why would that end up locking the entire computer sometimes! One help is to suppress RSS doc loads!
Horror! In Photoshop, CS5, sometimes, for no reason, the image decides to rotate the entire canvass about 15 degrees, LOL! Remedy: save the image and reopen. It can be normal once more!
What other issues have you found and what solutions are there?
Is it easy to go back to OS X.6 on a new Macbook Pro?
Asher