after using Thunderbird for years, new incoming email now display as: LP/dfHZJml//VOFFsq+rhu5OJP4DCm6cS7aNBZz0K1VLckif83iE0ZZkBM+RBJ3qjtpfOARokH9i with many more similar lines -- always the same text string though. I have restarted the app, the OS, troubleshoot mode, reinstalled the app -- nothing makes a difference. The email are displayed correctly on other machines running other email clients. It doesn't always happen, but when it does it is usually the 2nd and 3rd emails from the top of the Inbox. So it might not be a reception issue, but a display issue. Per the below reply, I repaired the folder, and do seem to have stopped seeing that particular error, but now i have seen an email display the body of another email. I can still correctly view that email on another platform using another email client. How would this even happen? Aren't the email header and body all part of the same file?