Thunderbird 38.4.0 has not yet been released. Reviewing the notes from the status meeting on November 3rd, the release was planned for around November 5th. This delay is not unusual and likely we will be seeing the Thunderbird 38.4.0 release during this coming week. While going through the meeting notes did notice bug 1211160 which had to do with ‘some’ users who updated to Thunderbird 38.3 with Lightning 4.0.3 enabled lost use of the buttons in Thunderbird. Users reported that rolling back to Thunderbird 38.2.0 resolved the issue. Other uses reported success by disabling Lightning 4.0.3 prior to updating to the…

There are a couple issues with Thunderbird 38.2.0 when starting up from a long sleep or hibernate (especially overnight). First is Bug 1196662 Thunderbird not checking for mails and becomes unresponsive after hibernation (problem is caused by upgrade to Thunderbird 38.2.0). While I have not experienced issues Thunderbird becoming unresponsive I have noticed I need to click the ‘Get Messages Button’ in order to ‘kick-start’ Thunderbird to periodically and automatically check for new messages. Second which appears to be related to the first and affects those who are using Lighting: Bug 1199994 Today pane date incorrect after overnight hibernate [TypeError: this.mDeferred is null]. I have…

Mozilla released the next scheduled update for the Thunderbird 38.x branch with 38.2.0 on August 14, 2015. There have been some changes to this version for increased stability. CHANGED: Hardware acceleration is now disabled by default to avoid crashing Thunderbird FIXED: A few bugs have been fixed to avoid crashing Thunderbird UNRESOLVED: The “maildir” storage type can no longer be set through the UI due to various issues. Power users can still set the storage type using the config editor. The next planned update for the Thunderbird 38.x branch will be around September 22nd with Thunderbird 38.3.0 release. Users can update…