Let's track some of these issues in one place. Intentionally inludes some already closed bugs.
(Posting here rather than in bug 1211291.) About 1.5M users have updated to 38.4.0  which is about 20% of our ADI. Automatic updates have been disabled since Friday noon. Of support topics mentioned in bug 1211291 comment 10, the only one so far that reports trouble with 38.4.0 is https://support.mozilla.org/en-US/questions/1086944#answer-811993 http://forums.mozillazine.org/viewtopic.php?f=39&t=2976209 might be one new report of bug 1211291. No new bug reports, and fallen indicated on IRC not hearing of any reports. Plus there are these reports of other potentially related issues - calendar getting re-enabled https://bugzilla.mozilla.org/show_bug.cgi?id=1182629#c16 (only one report, theone) - https://support.mozilla.org/en-US/questions/1096132 Several email accounts but can only load one at a time. Thunderbird 38.4.0. - Bug 1228515 - Version 38.4.0 is lacking conext menue to convert email into task/appointment - perhaps not related but mentioning for completeness, Bug 1228251 - Mail of Gmail account keep disappearing I think this is all far less than the problems reported for 38.3.0 when we were at a similar number of users. However, we will see what tomorrow brings, with automatic update still disabled.  https://crash-stats.mozilla.com/daily?p=Thunderbird&v=&v=38.3.0&v=38.4.0&v=42.0b2&hang_type=any&os=Windows&os=Mac+OS+X&os=Linux&date_range_type=report&date_start=2015-11-12&date_end=2015-11-30&submit=Generate
~11 hours later ... two more reports in the various venues - one in bug 1211291 comment 34, which is the same user reporting at http://forums.mozillazine.org/viewtopic.php?f=39&t=2965781&sid=8643ffb5d395585bc71040d44a502e25&p=14421671#p14421671 "Almost all functionality gone" - beuss in #calendar
And now for something totally different ... Bug 1229555 - Lightning uninstalls itself on every minor Thunderbird upgrade
Depends on: 1229555
one report on 38.4.0 last week in bug 1211291. but nothing no others since comments 1-3
Depends on: 1211291
Actually, I think all of these issues would be reduced by bug 1493008.
potential workaround for some users https://support.mozilla.org/en-US/kb/calendar-updates-issues-thunderbird
The workaround listed on that page did not work for me. However, I found one that worked: set intl.locale.requested = en Once I set the locale to English, lighting would appear.
Erich, can you please file a separate bug for that and include a description of your setup?
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