The captcha box is used on any page where you upload content to the site. It shows a word that you have to enter in order for the form to submit properly, and is used to prevent spam.
However, AOL users will have found that they were unable to enter the word correctly. This is because the first time that an AOL user visits a page, AOL will store a copy of that page on its server. Then, when the AOL user goes back to see that page, instead of showing them a page from the site, AOL shows them the one stored in its memory instead. It does this to save money, and unfortunately it causes problems on pages where certain bits of content change (such as the captcha box).
So, until Matt can find a way of getting round this problem, we’ve removed the captcha box from the site.
I’m sorry for the trouble it’s caused you, and thank you for letting us know about the problem – we’re ‘on the case’, so to speak!