If you're referring to the beta, 3.0.2, at the bottom of the page, it says a msg about certain people having java 1.3.1 installed, so I'm guessing that's what they're using. If you subscribe to the beta discussion, they've been talking about implementing the new java (1.4.1 I believe), and I don't believe they've actually done it in the latest beta, but I could be wrong.