I just got updated to Thunderbird version 5 today. I WAS on 3.1.11. This is fucking ridiculous! Jumping that many version numbers is completely unwarranted, IMO it's just so they can get parity with Firefox. Now Thunderbird is at parity with Firefox, I have a niggling suspicion that they might make a move toward another Mozilla Application Suite. Not that I'd mind, I'd actually rather like that (MAS was what got me into Firefox in the first place). I just think that all this version number inflation is going to succeed in doing is alienating their core users. I find it rather insulting that they feel the need to wow us with higher version numbers just to "keep up" with the competition.