Comment 12 for bug 1710515

Oh for sure, someone (thunderbird, duplicity, deja-dup) is screwing up. With the limited information I have so far, I'm going to guess duplicity (deja-dup doesn't deal too directly with issues of file permissions, but maybe we are trying to be too clever for our own good in some way or maybe we should have reported some error back when the original backup was being made that we didn't ).

But none of that helps you right now. I can set up a thunderbird account and back it up and restore a few times to see if I can trivially trigger this bug. But issues like this are hard to debug. Especially since we rarely get to have access to the files causing the problem.