User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.130 Safari/537.36 Steps to reproduce: I upgraded from version 31.7.0 to 38.0.1 then some of my emails with Chinese characters are not correctly displayed. Actual results: All the Chinese characters in the mail are not correctly displayed. However, if I manually choose View->Character Encodeing->Chinese, Simplified (even if it's already checked), the reader goes back to normal until I view other emails and go back to the problematic email again. Somehow, some of the emails does not have the encoding issue. I can't find out the reason. So I attached 2 mails for you to analyse. Expected results: Encoding should be automatically detected and Chinese characters should be displayed correctly.