I got the fake version of TMC too. Like everyone else, I got it from eBay. I got it like two weeks later than the UK release so it's been going on for a while. I completed it like 20 times before it erased my data and stopped saving properly though so it was worth the money really. I also have a rom that I can use now so it's not much of a problem.

Oh and the sellers ratings were perfect so don't trust them so much. Buyers may not realise they are fake if they work properly like mine did. I only found out now that it's fake. I thought it was an import or something.