@jazz123: If you look in ACP> General tab> Board configuration> User registration settings> Limit username chars> the text below that and dropdown box describes what is available.
For lengths ACP> General tab> Board configuration> User registration settings> Username length/Password length
Generally, each new release is given a nickname, that one happens to be Olympus others are Ascreus, Bertie's off to the beach and Patience is a Virtue etc. One is even called "Richard 'D¡cky' Foote" in remembrance of one of our support team members. Either way, you can still find information using the version number.
"The more connected we get the more alone we become" - Kyle Broflovski