If you watched (or recorded) last night's repeat, perhaps only on Fox, you got a different set of credits than the premiere had!
Originally, Homer rambled on for a little while, over the regular theme. Now, it's a completely different ramble, going all the way through, with no music! (It diverges as soon as the picture disappears and exec producer credits show up.) I can transcribe or encode it later, if anyone would like.
(I only caught the end of the episode, so I don't know if there are any other changes. I don't see why there would be.)