from Gamespy may shed some light:
 
 Dear ForumPlanet Member,
 
 A few weeks ago we alerted every ForumPlanet user about our 
 upcoming forum system upgrade and the requirement to move to 
 unique nicknames across the ForumPlanet boards system. You are 
 receiving this email because our records indicate you have yet 
 to go through the steps we outlined in order to secure a unique 
 nickname for your login.
 
 On May 3, 2007 we will be switching over to required unique 
 nicknames for all users. Members who have not yet secured their 
 unique nickname will be automatically assigned one by the system. 
 We want you to be able to pick your unique name, so please take 
 this moment to secure your nickname by following this procedure:
 
 1. Go to 
http://login.forumplanet.com and Logout.
 2. Once logged out, choose Login
 3. If you have a unique nickname already, you will not be 
 required to do anything further -- congrats!
 4. If your account does not have a unique nickname or your 
 choice is taken, you will be redirected to a page where you can 
 manually enter a new one or use one of the suggested nicknames 
 we supply.
 
 Thank you,
 ForumPlanet Team