User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.110 Safari/537.36 Steps to reproduce: Nothing, I notice it when I'm writing an e-mail. When I'm typing the program hangs causing glitches when typing. Actual results: From time to time thunderbird uses 100% cpu, causing the program to freeze with no apparent reason. I was triggered to write a bug report by this blog: http://rainbow.chard.org/2013/02/19/thunderbird-high-cpu/. Expected results: A silky smooth experience like I was used to.
Please start thunderbird in safe mode - http://support.mozillamessaging.com/en-US/kb/safe-mode Does problem go away?