Not sure where things break down for you. Did you get to the activation stage?
I just tried creating a new account. Had no issues getting to that stage (I'm just a regular user). Clicked the brand new picture matching malarky (that I hadn't see before), everything seems working, got the final "Your account has been created. However, this board requires account activation, an activation key has been sent to the e-mail address you provided. Please check your e-mail for further information." message just fine. (Of course, I already have my account, so I didn't actually proceed from there).
By "There was an error in one of your responses" do you mean the picture matching thing?
Have you tried another browser than Internet Explorer?
Have you tried registering under different user names? Using different email addresses?