Software, Usability registration form does not play nice

I’ve been trying to register on since yesterday, but I keep getting an incredulous error message when entering the captcha correctly:

ustream registration form

I’m on Win XP using Firefox I’ve tried c leaning the cache. I’ve tried everything. It fails to accept a correct captcha on every session.

Is this happening to you too or is it just me? Am I an idiot doing something wrong? Leave me a comment and tell me how it’s working out for you!