In case you missed it, we released Beta 14 a few days ago. It is available for download from our Beta Program page. Your reports so far indicate that it is much more stable than b13 or b12.
I am working now on b15, in which I hope to restore compatibility with Snow Leopard. I have it basically working now, but it's still pretty fragile.
I may not be responding to bug reports and email until next week. Some visiting family and other festivities will be enforcing a little time off from solitaire work. Keep sending your reports, I love 'em and I want 'em; but don't be worried if I don't respond for a few days. I'll start catching up on Monday the 24th.
See you then!