I have it running on 10.7.3 at the moment.
The issues Im having are not ticky tacky and could be the Smart Tools.
Basically having to click numerous times on a edit point during Trim takes a bit too much patience. After the battle with finally selecting and moving, it takes a few tries before you can actually Roll an edit.
The Waveform on Audio tracks only appear when I have an IN/OUT placed.
So this is a bit of work around.
The Key-frame problem is probably me since they implemented new tools.
I didnt have these issues with 5 and 5.5.x.
At least (knock on wood) AMA is acting right this time around 🙂