Just a quick one, a number of users have contacted me reporting email problems with the error on the contact form Unable to submit your request, often this error is actually caused because between versions 1.3 and 1.4, an invisible form field called hideit was added to Magento, which if absent, will cause the form submission to fail. That means if your template has a custom contact form, it will break. That’s a bit of a bummer if you’re upgrading Magento versions.
There are a few fixes floating around, so I won’t reproduce one here.
Take your pick:
There’s a lesson there, be very careful about copy the entire default Magento template tree and making changes, try only copying the ones you need to change – it’ll make your template far more resilient to changes when upgrading.