Contact Form not working after the Upgrade

If you have recently upgraded your Magento to the v1.4.0.0 or v1.4.0.1 , then you may get an error on your contact form page. So, here is a simple fix for that.It is actually theme update thing.

Replace yourtheme/yourtheme/templates/contacts/form.phtml with new base/default/templates/contacts/form.phtml

That should do it. 

Or 

add following hidden field to your current template :

<input type="text" name="hideit" id="hideit" value="” style="display:none !important;” />