Dear Sir/Madam, I have been reading my gmails through Thunderbird. However, upon updating my Thunderbird from ver. 24.xx to 31.0 (on Mac OS 10.9.4), it suddenly became impossible for me to read my gmails. This problem has occurred to my two independent MacBooks right after updating their Thunderbird to ver. 31.0. Therefore it should NOT be due to virus infection, etc., I guess. I would appreciate if someone in the community could solve my current problem. Thanks in advance, A researcher in the biomedical field in Japan