[Bug 1244619]

[C2e9b7]

Hi,
I had the same problem, and still had it with 24.1.0. Then I found this workaround which solves the problem. USE AT YOUR OWN RISK!
a. mv ~/.thunderbird in ~/.thunderbird.old
b. update thunderbird (I had to do it as root)
c. run the new version of thunderbird (as user), skipping all the suggestions to create an email account
d. install lightning (I also installed google calendar provider; you may need to reinstall more)
e. restart thunderbird
f. copied back everithing from ~/.thunderbird.old/<some random string> ~/.thunderbird to the new ~/.thunderbird/<some other random string> besides the following:
_CACHE_CLEAN_  chrome  extensions  extensions.ini  TestPilotExperimentFiles

Note that I COPIED and not MOVED them back, because in case of problems I wanted to be able to delete the new ~/.thunderbird directory without losing anything. Maybe I could have copied back some more file, but everything seems to work.
So in my opinion, there is some file left from old installs in those directories, that disturbs the new version of Lightning. Anyway, now everything works fine for me

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https://bugs.launchpad.net/bugs/1244619

Title:
  Thunderbird must be upgraded to Thunderbird 24.0.1 for lightning 2.6.1

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