I am thoroughly confused. I'm getting a new computer, and figured that I should update to the latest version of Thunderbird so that I can migrate my data to that version on the new computer. I go to the Thunderbird website and see that the latest version is 24. But when I go to Help -> Check for Updates in Thunderbird, it tells me that the latest version is 3.1.10! I thought the message might be in error, so I proceeded with the update, but it did indeed install a version numbered 3.1.10 (and 5 minutes after that, Check for Updates tell me that there is a LATER version, 3.1.20!). I did Google searches and looked through the Thunderbird FAQ, and I could not find out what is going on with Thunderbird version numbers. I thought it might have to do with the fact that I'm running Windows XP, but I checked the system requirements for version 24 and XP is listed as an option. Why do I get a version 3 when version 24 is the latest?