Recently some of my email, particularly from Apple and Prosper, appears with every character replaced with a d or weird punctuation. The message itself is intact, as I can view the text if I switch to simple HTML or plain text. I assume it's corruption in Thunderbird's UTF settings, but I'm not sure how to fix it. This is a new computer with a clean installation of Thunderbird 78.9.1. Here is an example of what I'm seeing. https://gyazo.com/cc19d383c0885f681d2c400f73760c45