Some of the changes I love is tagging and message preview with the new mail notification. Note that it’s a beta, and it has some flaws… But that shouldn’t stop you, go get it now! :-)
I got it via the automatic update system, but it doesn’t mention it on the official website. I found a release candidate of 220.127.116.11 on the FTP site though. Strange…
Not so strange after all, it’s all explained in the “What the heck is with this 18.104.22.168 update?” article at developer.mozilla.org.
Grab your copy now! You will find many enhancements in this new version, compared to the old 1.07.