Using 52.8 in WIN 7 Pro workstations. For certain emails Thunderbird displays a received time (in the folder item listing) that is exactly 1 hour later than actual time. Checking headers reveals accurate time stamps from all server steps. LAN router and local workstations have correct time. This is consistent for email from a given sender (sending device time is correctly set) and the displayed time is identically incorrect for multiple recipients. Where does Thunderbird get the displayed "received" time?