User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.8.1.4) Gecko/20070515 Firefox/2.0.0.4 Build Identifier: all I wanted to delete first person from a custom folder in address book. The list of persons in the address book custom folder was visible and top person seemed to be highlighted. I hit delete. 'Are you sure?' popped up, and without hesitation I hit the return key. Oh no, that was the mail folder that got deleted, not the person highlighted! Ok, go to file to undo last action....bother, not possible. Ok, go to recycle bin to reinstate the folder....bother, not possible either. So I have lost the contacts in the folder, not good. Summary: This is a bug by definition of misleading visual situation leading to unrepairable very serious error involving very serious loss of critical data. Reproducible: Always Steps to Reproduce: 1. Delete an address book folder 2. Confirm after are you sure, because you are thinking only highlighted contact will be deleted. 3. That's it, the damage is permanent. Actual Results: Permanent loss of address book contacts in highlighted folder. Expected Results: The top listed address book contact only would be deleted. 1. The top listed contact in the address book folder should not have been highlighted by default without being clicked upon. 2. There should have been a 'undo last action' opportunity. 3. Should have been in the recycle bin.