Quote Originally Posted by lat9 View Post
You still haven't indicated whether or not CSS buttons are in use for the store. OPC's /tpl_modules_opc_submit_block.php (distributed in /template_default and possibly overridden by YOUR_TEMPLATE) uses the built-in zen_image_button function to create that button.

You might try comparing the use in that OPC template-file against others provided by your template.
No, CSS buttons aren't in use. I have had a look for a submit block file to compare but can only find the OPC one.