I'm noticing that some people's profiles show what appears to be a birthday in the "Chat Room Avatar" field. It might be that the people I've noticed accidentally typed their birthdays into the wrong field, but is it possible that it was caused by the upgrade?

Nevertheless, I would encourage everyone to check their own profiles and make sure that their entire birthday is not on public display. Month and day, maybe, but in this day and age of identity theft, I think it's a bad idea to post your entire birthday.