I'm also getting pretty frequent crashing under OSX 10.8.3, especially when switching between synths in the studio view and every time I close the stand-alone app. I haven't had the chance to play much with it as a plugin so I don't know if the same will hold true in my DAW. I've submitted a support tkt so we'll see if there's any insight as to the issue. The software is on v1.0, so it's a possibility we're both encountering something that will be in a 1.1 bug fix.