So apparently there is a big thing on the Internet about the Berenstain Bears that someone brought up at work. I remember the bears being called Berenstein (and so does about a million other people) but it was actually spelled Berenstain. Many people have commented about what various reasons this could be with the most wild have to do with time travel.
I thought it was really funny to see how many people have apparently been wrong with whole time and its thrown us into a tizzy.
P.S. - Personally I think its a pronunciation/accent thing. Someone at some point in our past pushed that the pronunciation is BerenstEin but it was spelled as Berenstain.