So I updated to OS 10.8.2 and now none of my DT scripts work

What the hell is going on?

Could you be more specific? On 10.8.2, I just now ran through a random selection of a dozen or so scripts that I wrote or that were shipped with DEVONthink Pro Office, and they all work (except Import > Daily Dilbert which is broken for reasons unrelated to OS X or DEVONthink).

My mail script doesn’t work. I posted here.

Works for me-I posted my results in your link above.