I had an issue with Magento CE Version 1.4.0.1 where an email would not be sent when a visitor used the contact us page, I found the fix using Google, on ScreencastWorld
In WEBROOT/app/design/frontend/base/default/template/contacts/form.phtml
Look for
<div class="buttons-set">
It should look like this, the important part is the input file name=”hideit”
<div class="buttons-set">
<p class="required"><?php echo Mage::helper('contacts')->__('* Required Fields') ?></p>
<input type="text" name="hideit" id="hideit" value="" style="display:none !important;" />
<button type="submit" title="<?php echo Mage::helper('contacts')->__('Submit') ?>" class="button"><span><span><?php echo Mage::helper('contacts')->__('Submit') ?></span></span></button>
</div>
Good luck !
