I hope this is the right place to report issues with the ST3 beta.
I have a fairly reliable crash condition–if I use Cmd-Shift-R to open the search for symbol in project (in a fairly large project), search for a symbol that appears several times, then, when the results come up, hit Cmd-R (or Cmd-P or Cmd-T–not sure it is important), the editor crashes–either it pinwheels, or it immediately crashes and exits. This is on Mac OS 10.8.4, ST3 Build 3047. I can generate a crash report if the bug can’t be reproduced from this description.