I am not sure if this has been posted, but I was unable to select my primary character upon registration when using Fire Fox. I had to use IE in order to do this.
As an aside, I am a web developer, and telling me that IE is the only supported browser is not going to cut it. I think that this should be fixed, IMHO.
As an aside to the aside, no one has told me that yet from SE, but I fear that they will.