I just found this issue, and with latest 12.10 I have this issue, only when using Thunderbird. I have been working on my laptop for 4 hours. In the first two hours I have Thunderbird open and it crashed every 20 minutes (I can't recall if firefox was also open). I shutdown and didn't open thunderbird. I have been working in Chrome testing Amazon Web Services stuff for the last two hours without issue. It appears to be thunderbird causing the problem for me. Anyone else?
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