Yesterday, while in the office composing an email, I noticed Thunderbird wasn't automatically underlining misspelled words. So I checked the version of Thunderbird I was using and as I suspected, it was quite outdated. So I upgraded and the auto spell check worked great. Then this morning Thunderbird 2.0 was released and now I've had to upgrade again!
Enough with my complaining. Thunderbird 2.0 is worth the upgrade. I use Thunderbird exclusively for email, at home and in the office. I've wanted to switch to a console based email client such as Mutt or Pine, however I would only feel comfortable doing that if I was running my own mail server and kept constant backup's of all my email. There are so many things you can do to your mail file in Linux that screwing around with an unfamiliar email client would be too dangerous.
One of these days I will get around to setting up an IMAP email server that uses fetchmail to retrieve my email. And from what I've heard, Mutt is the king of console email clients, so I'll probably take my time to learn that as well. But that's for another day, and another post. Until then, Thunderbird is an excellent OpenSource email client.