I must admit that I didn't notice this in the cinemas (even at IMAX), but according to wikipedia Demolisher is called "Wheelbot" and Rampage is called "Skipjack" in the ending credits, as these were their names during production before they were finally called Demolishor and Rampage. It seems that whoever was in charge of the ending credits didn't bother to update those names. Oops.
Now prior to 2007 I would think to myself, "It's okay, I'm _sure_ they'll fix that up in the DVD" - as usually happens in many other movies... but ya know, that's what I told myself when I saw Brawl being called Devastator in cinemas, and lo and behold, he's still called Devastator on the DVD!
The ROTF DVD is slated to come out on November 5th according to this thread. So from now until then let's place our bets! Do we think Paramount will correct this mistake or will it remain! If it does remain, then doesn't that mean that Demolishor and Rampage's names will be _officially_ Wheelbot and Skipjack respectively in the film? After all, there have been plenty of times when a Transformer's name differs between toy and screen, such as:
+ Jetfire -> Skyfire (G1 cartoon)
+ Beast Changer -> Noble/Savage (Beast Machines cartoon)
+ Decepticon Brawl -> Devastator (Transformers live action movie)
+ Scalpel -> The Doctor (Revenge of the Fallen)
Now if their names are corrected on the DVD we could consider that a retcon, but otherwise I think it means we would add...
+ Demolishor -> Wheelbot
+ Rampage -> Skipjack
I'm personally rather skeptical so I'm betting they won't. ;)