User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en; rv:1.8.1.19) Gecko/20081212 Camino/1.6.6 (like Firefox/2.0.0.19) Build Identifier: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.1b3pre) Gecko/20090223 Thunderbird/3.0b2 Version 3.0 *still* doesn't have a "Reply to List" feature. Thunderbird users have been requesting this for 5 years (see bugzilla); most, if not all, other mail clients have this. Making things worse, 3.0 breaks the reply-to-list add-in. Reproducible: Always Steps to Reproduce: 1.Receive a message from a mailing list 2.Look for a "reply to list" option 3.It's not there. 4. Look in Toolbars-->Customize 5. Still not there. 6. Try "reply", it replies to sender. 7. Download the "Reply to list" Add-in. 8. Try to install 9. "Not compatible with Thunderbird 3.0" Actual Results: "Not compatible with Thunderbird 3.0" Expected Results: A reply-to-list feature should have been included in 3.0.

This is actively being worked on in bug 45715.