Rated 1 out of 5 stars
I completely agree with Frédéric Jeanbart on this one. I hate essential features being relegated the status of "addons". Soon we'll have to download a "check email" add on to use Thunderbird.
Worst of all it's not even working with Thunderbird 3.0.1 meaning there is no contact manager functionality available for for this program. If Evolution worked for Windows I'd use it.