I run mavericks on a macbook pro late 2012, with 12GB of RAM.
The problems show up after you use it a little bit, not from the start. Try adding/removing objects such as trees and play with the library.
After a while you'll start noticing the problems.
Interface starts behaving abnormally, objects tree views sometime do not show some items, and yes - crashes (also if you just close the application - it will throw an exception).
Unfortunately I had to switch to Windows for the moment, on my macbook TG3 is currently too unstable (sorry to say this, but I'm sure it will help to make it an even better product! )
sirio