I saw something like that recently too, after editing a post to add code tags. The post ended up looking like a binary file. When I refreshed it went back to normal.
it was fine for me too after I reloaded. Wasn't TOO big of a deal, just thought I'd mention. First time logging on in months (I know, you all missed me ) and it seems to have a few bugs. Posting a response it noticeably less snappy, lots of times I try to load a page and just get a "no server response" or whatever error.