1. There was a new title sequence which announced boldly that the Transformers were now in "The Unicron Battles" (How Pokemon).
2. Said title sequence had a HONKING GREAT SPOILER in it. OK, said spoiler wasn't a huge surprise, given the way they seem to be following certain plot developments from the original 80s cartoon, but still.
Hmm, it was a pretty slow episode... we did get to see that the kids do actually go home occasionally and don't just hang around with the Autobots all the time. Not that I'd blame them. Given the chance I'd hang out with giant transforming robots as well.