User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.6) Gecko/20060728 Firefox/1.5.0.6 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.6) Gecko/20060728 Firefox/1.5.0.6 If you close the compose window while replying to an email, the "replied" indicator is not displayed on the message you replied to. Reproducible: Always Steps to Reproduce: 1. Reply to an email 2. Save your draft without sending 3. Close the compose window 4. Re-open the draft from the Drafts folder 5. Finish your reply and press Send Actual Results: The "replied" indicator icon is not shown on the message you replied to Expected Results: The green "replied" arrow icon should be displayed, the same way it is if you press reply and immediately send. I believe this happens with the forwarded icon, too. This is a problem in Outlook Express, as well, but Thunderbird can do better.

The fix has actually been available for a while, but not for 1.5; you need to be using a 2a1 build. The next official build with the fix will be 2.0. *** This bug has been marked as a duplicate of 128996 ***