Anyone that actually watched both episodes (it was a two parter) would know that Comedy Central stepped in and censored the shit out of the second episode, which aired last night. They even bleeped out every mention of Muhammed, which they didn't in the first episode.
I've seen every episode of all 13 seasons. I know SP pretty well, own all 13 DVDs and watch them all the time (favorite show).
The 2nd half of that episode went out of it's way to constantly say the word Muhammed repeatedly, and yes, it was censored. But it's easy to see, compared to their other episodes, that this censored word was preplanned. Like the episode where they vowed to say "****" on cable TV. They said it like 100 times in one episode, just to make the point. The censored Muhammed word was spoken MANY times, on purpose, so I think it's been planned the whole time that the 2nd episode would be like this. It's a brilliant PR stunt by those guys. Stir the pot, create a buzz, give everyone a week to make threats or wonder if they'll actually show Muhammed, then pull this censorship prank.