Your application inserts the JavaScript below before the doctype I am entering in the custom html for my products: Authors -> Storefront -> Custom HTML
<SCRIPT LANGUAGE="JavaScript">
var bNextButtonEnabled = false;
var bNextButtonClicked = false;
var bUsePreContinueHandling = false;
function FormSubmitted()
{
PreContinue();
}
</SCRIPT>
Any content before the doctype will trigger a bug in Internet Explorer 6 that results in pages being rendered in "quirks mode". This causes IE6 to emulate the incorrect box model of IE5.x/win. Ironic, a bug that unintentionally resurrects a bug from an older product that has been fixed in the current.
It may be difficult to insert the script in the <head> portion of the doc where it really belongs. Alternatively, it could be inserted before your generated content in the <body> portion of the document. This will result in a document that will not validate with many doctypes but will not trigger this bug. The document in it's present form will not validate anyway.
Thanks,
Mike