I have also been experiencing thunderbird sometimes consuming 100% cpu. In my case I have a suspicion that it may be related to what appears to be a bug in ibus that I have reported here: https://bugs.launchpad.net/ubuntu/+source/ibus/+bug/1162008
I have also been experiencing thunderbird sometimes consuming 100% cpu. In my case I have a suspicion that it may be related to what appears to be a bug in ibus that I have reported here: https:/ /bugs.launchpad .net/ubuntu/ +source/ ibus/+bug/ 1162008