Not sure what happened, but it seems however that http://haskell.org/ghc/ was reverted somehow, since it now only talks about 5.04, there is no longer any mention of 5.04.2.

I moved things around a bit, and forgot to update a couple of links. The 'Download' link on the left contents pane has always pointed to the right place, though. Sorry for the confusion. Cheers, Simon