recaptcha fails with "invalid request cookie" error code in IE9

[GoogleCodeExporter]

We have a form in the webpage (implemented with jade) that allows the users to 
sign up to our service. We use the recaptcha API there to prevent spambots

It works fine with chrome,firefox,safari browsers but when done from Internet 
explorer, it fails and I get the error code "invalid_request_cookie" which 
means that the challenge cookie is invalid, but I have double checked my code 
and we are injecting the incoming challenge right along with the response and 
for some reason it fails only in IE9

P.S I tried changing the browser mode to compatibility view as suggested in 
some articles, but even that did not work

Please share your thoughts and help me

Thanks in advance

Maheedhar

Original issue reported on code.google.com by mahee@actonmagic.com on 19 Sep 2014 at 9:46