Further update: a fresh install of Thunderbird via Synaptics seems to have sorted things out. CPU is now normal.
-- Thunderbird causes high load/HD usage since upgrade to 10.10 https://bugs.launchpad.net/bugs/658195 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
