Re: reCAPTCHA only issues
"Ebay.co.uk is using it as well as login"
I gave up on ebay, it won't even let me enter my postal address (or any address at all!) Whatever I type it just says "Enter a valid address". So I abandoned the sign-up process.
It must be objecting to Firefox blocking third party cookies or some other privacy setting, but I wasn't going to wade through all the settings to find if one of them was responsible.