Have experienced a myriad of problems since the 93.0 update. Have checked Comcast server settings and they all are correct. 1. Randomly, I get a panel asking to enter my Comcast password when downloading messages . Have entered it and messages load. According to community support, once put in, it is saved and re-entering will not be necessary. 2. When sending messages, the "sending message" panel appears. Sometimes in sends, and sometimes it just stalls showing no progress or goes to 100% and stalls. The 100% stalled message does no show up in my SENT folder. If I keep retrying, eventually, the message is sent. 3. When mp4 files are attached and clicked on to open, the "What should Thunderbird do with this file" panel appears and the "open" option is clicked. Thunderbird then locks up for about 30 seconds and a''' "server execution failed" message appears. I can play these mp4 files on the comcast email web site. Have been using Thunderbird for years and have had no problems. Can't find a solution for any of these on the "ask the community" support.