Comment # 1 on bug 986162 from Mircea Kitsune

I can confirm this: Right after last night's update (reinstalling +3000
packages) Thunderbird crashes at startup. This doesn't happen with a fresh
profile, and only seems to occur once a server is configured.

As others were able to confirm the problem on IRC, I'll set this to confirmed
as there's no doubt to its existence. I also imagine it's a high priority
problem, as it renders the program unusable.