No not Boris although he certainly is an oddity, with the personal message system I have had a few with Dappers recently and each time I visit the site and have a reply there is a red icon on the envelope to tell me of a new message and it pops up in a window so easy to spot but.... I've also had a few with Lewis Blackburn recently and never yet had a notification from his messages, I've had to go and look in the message list each time to see if he's replied.
Why would it react differently to different members?