1) Wafer didn't attack nearly as much this game. On one memorable play he got his shot blocked by the backboard! Never seen that before.

So, he didn't put as much pressure on the officials as he has been.
2) They actually called fouls on Houston for mugging the Blazers.
3) In a demonstration of how lopsided the calls have been against the blazers, Lowry went crazy that he was actually called for fouls. He's been really aggressive on the offensive and defensive end this series, but he had no recognition that his "defense" was actually fouling. Only this game, they were called. It's a bizarre world they Kyle freaking Lowry is expecting superstar ref treatment.
4) In another demonstration of how lopsided the calls have been against the blazers, they showed an instant reply where a picked Battier grabbed Roy's arm and pullled it to keep Roy from going anywhere - he was called for a foul. What's so lopsided? He was livid that he was called for a foul when grabbing a guy's arm and pulling it back with all his might. Obviously, Battier is used to that being a fair and standard type of play.
5) Did the Blazers get away with a few - absolutely. Did the Rockets? Yes, they did. However, the refs actually called fouls in a normal manner, and the Rockets couldn't adjust - that more than anything is why they lost.