http://www.youtube.com/watch?v=5ZGGY0aVM1c
Just watched it again (Lebron's sixth). Looked like a clear foul when I was watching on TV, now it seems like ~80% against Pietrus/20 against Lebron. At any rate, he was definitely due for a few bad calls going against him anyway, especially after G2. Would have preferred more blatantly rigged, like he's on his way to the basket and gets punched in the face and no call (like what pretty much happened to Rondo), but this makes things almost even in terms of officiating.
When I watched it the first time, I thought they were already on their way down when Pietrus put his arm around him to secure himself or something, now it looks like he clearly had his hand hooked around Lebron's torso.