No validation in ie9

Hello to all,
i have a very strange problem ONLY in IE9 (IE 10, FF, CHROME are ok).

The problem is on validation: not working with captcha.

You can try here http://www.smileclin.com/index.php?option=com_k2&view=item&id=101:richiesta-preventivo&Itemid=285

If you try to simply send (invia) form, it only show error about captcha.
If you insert correct captcha but incorrect values, the validation doesen't work!
The validation WORKS only if i don't fill captcha field or if i fill it wrong!

Please help...

Edit: found a good information to debug it. The problem happens ONLY if the form is embed in k2 article with plugin. If i launch only the form all is ok

HI mattiadj,

The form is inside <p> tags, this is not permitted in the HTML rules and IE breaks the form if you do it. Replace them with <div> tags and it should work OK.

Bob