I'm getting lots of 503s as well now. Not a big problem as refreshing clears them, but slows it down and makes me say sweary words.

Another little niggle recently - when I post an entry and try to put the white box onto the main pic, it doesn't show up on the edit page as inserted, so I can't tell if it's dropped successfully. But then going to the full page to check, the box cheerfully shows up as present and correct.