I am having the same issue with Windows 7. I guess it is not only related to Ubuntu or Linux. I tried to disable Global Search, remove .msf, rebuild index, compact folders and remove global-messages-db.sqllite. None of these steps make CPU lower.
I am running TB 17.0.2. [ ], Eric -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/927515 Title: Thunderbird stuck at 100% CPU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-consumption/+bug/927515/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs