What's weird is that both Safari and Firefox say the download is complete. I thought that there is a problem with my OSX install or a problem with the google server. I have had this issue a couple of times in the past but after a couple of retries I was successful. I have also seen this issue reported for other dmgs an awful lot since Tiger.
What I don't understand is where iTunes got the song information from. If is was just a plain aiff with no name I would have thought exactly what you had suggested but the aiff has Genre, Song Title and everything

That's what led me to believe that perhaps there was a problem with the dmg. Other people don;t seem to have had this issue with this version at least although I have seen in reported in an earlier version.
I ended up finding an osx beta on a different server which was just zipped rather than in a dmg and I am using that at the moment and I'd just like to say it works brilliantly.
What an amazing application, I am very impressed

This is exactly what I was looking for. I would like access to the latest one but it's probably a issue at my side so if I manage to resolve it I'll be sure to post here. Reinstalling OSX is not really an option at the moment seeing as I am in the midst of programming myself and all my work is on this machine...
What I am thinking is that the google server doesn't like the dmg mime type, perhaps if the dmg was zipped it may resolve this issue...