User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.3) Gecko/2008092417 Firefox/3.0.3 Build Identifier: version 2.0.0.17 (20080914) Prob 1: Emails from different threads with the same subject are treated as the same thread. Scenario 1: It's quite often that I email several people separately with the same subject and the similar but not identical content. Scenario 2: Sometimes some emails happen to have the same subject, esp an recent email happened to have the same subject as a several years old one. The two conversations are then totally merged as one. As all such emails are lumped into the same thread, everything is in a mess. Prob 2: The thread does not begin with the original email I sent, nor including any email I sent. I prefer the gmail style. Thank you very much! Jing Reproducible: Always Steps to Reproduce: 1. Email recipient A and B with the same subject "Test". 2. Reply from A and B. 3. Reply the two emails sent from A and B. Actual Results: Only two emails are grouped under the thread "Test", while the original two emails sent to A and B do not show up. Something like that: Re: Test A (the inline citation used the email addressed to A) |_ Re: Test B (the inline citation used the email addressed to B) Expected Results: Two thread with all the six emails, such as: Test from: me to: A |_ Re: Test from: A to: me |_ Re: Test from: me to: A Test from: me to: B |_ Re: Test from: B to: me |_ Re: Test from: me to: B

Bug 164115/bug 449821.