No rollback, just find the bugs, people, and report them via Mantis. Help the programmers!
Truth be told, I had a feeling this was gonna happen- features kept getting added machinegun-fast, that huge patch showed up, etc... so I'm not surprised there are some hitches.
It matters not, though! The bugs will get fixed, with help from players- this is a very important version of Spring, and I'm very excited about it, having been running the prior builds up until a few days ago (so, er, I guess I'm to blame for the bugs- truth told, it was stable for me, in testing with AI, so... meh). Most game developers using Spring will be very, very pleased with the changelog- the number of new features is really quite large, and many of them are just plain awesome!