I have no mods installed, I've only changed some core files to allow people to enter donation amounts instead of paying fixed prices. And in the footer I'm running a javascript from my host that shows my site is secure in the bottom right hand corner. But that is secure...

Code:
<script type="text/javascript" src="https://siteseal.servage.net/html.php?seal=2"></script>
I just tried removing it, but I still get the issues. Also I've switched my flash banner back to being relative rather then absolute with https://

This is quite frustrating.