Export freezing and crashing

I've been working on a 20 minute short film. I am trying to export and it won't work - it gives me an ever expanding time estimation and the fps counter never gets going for the export. Appears to be a major glitch.

Did it work in the regular version?

I have resolved - the issue was I switched soundcards but didn't change the I/O in preferences. It should still have exported obviously as I wasn't reliant on that particular bus, so a bug that should be fixed.