I was dismayed to find the new RealID feature was not working for me when I installed patch 3.3.5. There were a few others with the problem, but not many. After trying to log on from other computers and looking around the support forums, players have identified the issue.
There is a new Parental Controls option to disable RealID. If you have ever used Parental Controls, your account may have flagged to have RealID off by default. I played with it when it was added way back in the day just to learn about it, so my account is flagged apparently. The Battle.net Parental Controls are much different than the old World of Warcraft controls, so lets go through it real quick.