Q:

Thunderbird stuck at "Checking password..."

I hope it's not improper to post a question about Thunderbird on here, but I didn't find their site too helpful.  
The other day my Thunderbird stopped syncing with my email. I've tried everything I know to do (including re-installing Ubuntu) and I'm still getting a problem.  Specifically, when I go to setup an account, I get to the last step and click "Done," but the account is never created because it is stuck on "Checking password..."  When I first setup Ubuntu 14.04, it worked flawlessly, but now even after a re-install, Thunderbird is giving me this problem.
Plus, all of the information I have input into Thunderbird is correct.

A:

I solved the problem by removing my proxy settings for FTP and SOCKS. I did this by updating my /etc/apt/apt.config file as follows:
Acquire::http::proxy "http://<username>:<password>@<proxy>:<port>/";
Acquire::https::proxy "https://<username>:<password>@<proxy>:<port>/";

I'm not sure why Thunderbird had trouble when I had the FTP and SOCKS proxy entered, so that would be an interesting question for someone to answer. For now though, I'm satisfied that the problem is fixed.

