Banned in China: The Chinese Dragons. The Marching Soldiers, on the other hand, were banned in America, because they weren't in an American uniform.
Edited for Syndication: Episodes are pretty much tailor-made for international exports - you can have an episode on a certain educational subject (jumping, for example), but the episode's content as far as inserts go will differ from country to country.
Jim Cummings' voice can be heard in at least one episode of the American dub!
One of the narrators is George Stobbart from Broken Sword series.
Money, Dear Boy: British comedian John Simmit says the only reason he played Dipsy was because he needed money.
The Other Darrin: Two different performers played Tinky Winky during the series' run; the first performer, British comedian/actor Dave Thompson, was fired as a result of the whole Ambiguously Gay controversy surrounding the character. Thompson was incredibly upset over his termination, as he very much enjoyed playing Tinky Winky.
What Could Have Been: Word of God has it that Ragdoll (the production company behind the show) originally wanted to do a children's sitcom, aimed at the 7-9 age bracket, about bumbling space explorers, but a series of changes to the proposal eventually resulted in a kiddie show aimed at 1-3 year olds about huge baby-like creatures dressed up in spacey outfits who explore their own fanciful world.