User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.16) Gecko/20110322 Fedora/3.6.16-1.fc13 Firefox/3.6.16 Build Identifier: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.15) Gecko/20110307 Fedora/3.1.9-0.38.b3pre.fc13 Lightning/1.0b3pre Thunderbird/3.1.9 So you get an e-mail from someone who is in your address list. Let's say the person's actual full name is John Smith ... let's say that you have the person in your address book as Johnny, and that person has their name configured in their own e-mail client as Smithy. In your Thunderbird inbox, the "From" column will show: Smithy In the headers that appear in the message pane, the "from" field will show: Johnny This is an inconsistency without an apparent rationale. Reproducible: Always

Already fixed on trunk (3.3).