Ok, well that update didn't go quite as smoothly as I had hoped!
Without boring you with all the details, there was a whole lot that didn't get updated or migrated over properly, so a crazy lot of database update queries and mind numbing manual work was needed just to get the site back to where it is now.
There's still a whole bunch of things left to do - the media section needs to be migrated and things look a bit broken in places (webkit browser users (Chrome and Safari) will notice that the sponsor jobs listing is pretty elongated), but I'm working on it. I wanted to get things back in reasonable working order.
I'll be fixing things up as much as I can over the next few weeks, but if you come across anything that's glaringly broken, please do let me know here. Thanks!