I've watched the movie twice, once in cinemas a second time online(immoral I know).
In the cinema I laughed at the fact that the Ice cream truck had, on it's side, "

Online I wondered what the hell happened to the text? It just said "

The answer to the question of the Decepticon logo:
BAD CENSORSHIP!
For some reason in England the text was there, in the German version I saw online it wasn't.
I also saw it opening night in England (which if you remember was before it came out in America), so maybe people(to be read over-protective parents) complained about it after the first few nights and they removed it for later releases.