Have noted a lot of bugs in the beta, ALL of which have been reported.
However, I can add that the game appears to have at least one memory leak. On loading and starting a game memory usage begins a steady slide up to 1GB or more after about an hour of play. At the moment there are enough crash bugs that this isn't such a big problem, but once those are sorted we're going to hit the wall hard and fast on memory usage, IIRC XP32 will crash out at 2GB...
I don't have much in the way of useful diagnostic critera or data I'm afraid, just that it's reproducible 100% of the time if you can keep the game running long enough, so it should be pretty easy to find with some diagnostics tools.