I just got my Enthusiast badge on SuperUser (Woot! indeed), but haven't received it on ServerFault, despite me thinking I've been visiting both sites every day since I came back off holiday in mid August.
I've got both Google Chrome at home and Firefox at work to open all four sites at startup - so a) I don't have to open them manually and b) I don't miss a day. I know there was an issue with Safari's top sites feature so I was wondering if part of the fix was to require a certain amount of activity - not just opening the home page once.
If that's the case then fair enough, I know that I'm never going to be able to get much rep on SF anyway so missing the Enthusiast badge is not a big thing, but it will affect how I use SO and SU & whether it's worth me even trying for the Fanatic badge.
Of course I could have just missed a day without realising it and the badge will turn up at some point.
It's now been 4 days since I gained the Enthusiast badge on SU and it still hasn't turned up on SF. I don't think it was more than 4 days after I got back off holiday before I started visiting SF every day so (unless I did miss a day) I think the badge should have turned up by now. If it hasn't appeared in the next couple of days I'll fire off an e-mail asking if they can check the logs.
UPDATE 2 (22/09/2009)
An e-mail has been sent to the team. I'll post their reply as an answer.