Hmm im not sure about the errors
Line 114 = <g:mpn>XMAS</g:mpn>
Line 198 = <g:id>15</g:id>
Line 282 = <g

rice>3.50</g

rice>
They all look perfect from here. Can you drop an email to Google and ask what the problem is, as i cant see anything at all
http://base.google.co.uk/support/bin/request.py?contact_type=error&hl=en_GB
Also i think your error on the SSL part is based around the Google Analytics, but im not 100% sure.
<script language="JavaScript" type="text/javascript" src="http://www.google-analytics.com/urchin.js"></script>
<script type="text/javascript">
_uacct = "UA-4119985-1";
urchinTracker();
</script>
The best way to check is just unpublish the mambot, and then try and see if the SSl is working ok, if it is, then its my Mambot, but if there is still an issue then its not my mambot.
I have added this Mambot to many sites with SSL including
www.spot-ontv.co.uk and never had any problems at all from it.
but i have had to comment out the google analytics to make it work without the SSL popup, im just about to have some food, and ill see if i can find a fix for it when i get back, as i need to know the answer as well.
Regards
Ian