+++ This bug was initially created as a clone of Bug #507541 +++ User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9.0.12) Gecko/2009070611 Firefox/3.0.12 (.NET CLR 3.5.30729) Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9.1.1) Gecko/20090715 Thunderbird/3.0b3 In TB3 beta 2 and 3 (at least), if you select a piece of text in one e-mail (in the message preview pane), then right-click on another e-mail (in the subject list above) and click reply, the selected text from the open mail (i.e. not the one you are replying to!) is quoted. Additionally, the attribution line ("on date, xy wrote") contains the name of the author of the mail you are replying to, NOT the one the quoted text is from. Reproducible: Always Steps to Reproduce: 1. Open a folder with at least 2 mails from different authors. I call them mail 1 from author A and mail 2 from author B. 2. Click on mail 1 so you can see the text in the message pane. 3. Select some of the text 4. Right-Click mail 2, select reply Actual Results: You will see: On (date), B wrote: > (text by A from selected mail) Expected Results: Quote complete mail that was right-clicked. Maybe refresh the preview pane before any actions are performed, immediately when the context menu is displayed. As the blue "this message is selected" marking switches immediately, the preview pane should reflect this to avoid confusion.

I can reproduce it 100% in SeaMonkey. We need to port the parts from mail. Let just not call it a critical bug after 8 years :)