Has anyone got this (or another similar) contribution to work with STS?
http://addons.oscommerce.com/info/5196 (the contrib is meant to give you a box where people can input their email address to sign up for a newsletter)
It works with STS turned off as far as I can make out correctly. I've added it as an extra box and thus a placeholder for my template. With STS on it shows up fine until pressing the submit/action button, then I just get my STS template showing with the placeholder names instead of all the boxes - strange! If you go back to home or another page the template works fine again.
Any ideas on this one? If not is there a contrib you use that does the same job?
Many Thanks once again...