I have been trying to add new email accounts to Thunderbird and they never complete the process (I have several that configured correctly prior to this error). I have tried both automated methods (With and without HUB) and the manual method of adding an account. Here is what is happening. When I add an account, I can watch Thunderbird login to the account on the status line. The login goes correctly, however the "Done" tab is always greyed out, the process never completes. I then try configure the account manually at the same screen and I get "the server is already in use" message. I believe that Thunderbird is not correctly closing the connection, leading to the "server is already in use" message, but I am not sure how to correct the issue.