There's one small nit-picky thing that bothers me a little bit about Stargate: Atlantis. When McKay talks about the ZPM, he pronounces it with a 'zee'. But he's supposed to be a Canadian scientist and should be saying it as 'zed'.
Of course the most obvious explanation is that he's been working with Americans so long that it's corrupted the way he says things. I bet he probably uses the '-or' spelling instead of the '-our' spelling too.
Well, it's just a TV show I suppose.
I just realized that 4 out of the 5 main SG:A characters are Canadians after reading the cast profiles. I thought some of them looked familiar.