User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8.0.3) Gecko/20060426 Firefox/1.5.0.3 Build Identifier: version 1.5.0.2 (20060308) If any of the recipients of an e-mail has an e-mail address like 'x, y' <z@u.i.dd> then the address is split at the comma. This happens both in the main window and when trying to reply to the e-mail. The result is an incorrect e-mail address, and the e-mail cannot be delivered. The error does not occur if the quotation mark " is used instead of '. Reproducible: Always Steps to Reproduce: 1. Receive an e-mail as described above. 2. 3. Actual Results: The address appears as two addresses. Expected Results: The address should appear as one single address.

Since you haven't provided any data we can look at, I'm going to have to guess, but I bet this is a dupe of bug 254519.

(In reply to comment #1) > Since you haven't provided any data we can look at, I'm going to have to guess, > but I bet this is a dupe of bug 254519. > I checked and it is indeed. *** This bug has been marked as a duplicate of 254519 ***