For unstable I pushed a fixed version (see #966806).
This explains why I could not find this bugreport when I searched for gmail at first: it was filed right after mine :D
As you opened this report against the version of Thunderbird in experimental I'll ket this report open until a fix is prepared, should be done by the next version for experimental.
Yeah, I noticed it too late that I ran reportbug when I had the experimental package instead of the one from testing. As a general rule, is it bad to file bugs against experimental?
You can fix your current problem by installing libnss3 from unstable.
Apparently it migrated already to testing, very well, checking now. Yes, works fine, thank you.
