423710 Fix an ajax error

I have a signup page which shows an error when users submit their details. It's only taking in username, pass, email and captcha so it was working last night. I am a bit busy with other stuff so need someone to look at it asap. Per my experiene, someone might have edited a tiny file due to some misunderstanding and messed this up :) So if you are good, you will find it in the next 15 minutes.. so only bid if you give a few minutes right after you bid.