My Thunderbird Trash folder is messed up and it does not get fixed by "Repair Folder". When I delete a message it goes into the Trash folder but if I try to access the message, I get a pop-up error message:
The current operation on Trash did not succeed. The mail server for account for the XXX imail Gmail account responded: Some messages could not be FETCHed
The message count in the Trash folder continues to increase. If I look in the Gmail trash folder I can read the deleted messages. Unlike other users that have reported this problem I cannot find a corrupted message in the Gmail Trash folder. In fact I do not find any corrupted messages in my any of Gmail labels.