Just emailed Dan with this as well:
I've been able to make the loop crashes happen far more reliably like this:1) I start playback at some point in the middle of the project
2) I select a range of time or clip(s)
before this point and hit shift-L to loop.
Tonight I've been able to crash a project almost every time like this.
Anyone else seeing instability when setting loop points in this exact manner?