As per: http://www.bbc.co.uk/news/technology-20222998 , Microsoft has announced Windows Live Messenger is to be closed in March 2013. Obviously phpBB makes reference to this service by way of a profile field. It would look rather silly to continue shipping phpBB with the profile field still there even though the service would no longer exist.
Suggestion is to simply remove the msnm/wlm profile field altogether, and perhaps replace with modern alternatives: Twitter, Facebook, Skype etc.
|Extract profile field types to individual classes||Unverified Fix||