User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.0.2) Gecko/20030208 Netscape/7.02 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.5b) Gecko/20030909 If I have an address book entry for Joe Smith with joesmith@domain.com, I can later find duplicate entries for Joe automatically created in my address book. It would appear that the cause of this is a different case of his email address: JoeSmith@domain.com. I am not sure if this is further complicated by the reversal of his full name and or the addition of quotes surrounding his name by his emailer: i.e. Smith, Joe or "Smith, Joe" Reproducible: Always Steps to Reproduce: 1. 2. 3. Expected Results: If there is a case insensitive match on an email address, then no new address book entry should be created, regardless of case of email address or proper name of email sender/addressee.

This bug seems to be a duplicate of bug # 129393

*** This bug has been marked as a duplicate of 129393 ***

To the best of my knowledge this bug still exists in the main code. To get it fixed please go to bug 129393 https://bugzilla.mozilla.org/show_bug.cgi?id=129393 and click the vote button to raise its level of importance.