If you start off for example by clicking Acolyte, type in your character name, switch to Rogue, you’ll see the create character button disabled. More importantly even just clicking back in the name area isn’t enough to enable the option, you actually have to type something in the name area i.e. like deleting and adding a character.
Minor thing, but definitely some odd behavior. Also this behavior occurs after returning from the menu for creating a new character coming back. From what I can guess, this has something to do with focus on the UI element. Also, the create button wouldn’t actually do anything when it looked enabled, I’m guessing the name was taken, can something be done to indicate that?