The form code that you get from Paypal is getting changed to a truncated version and then the button doesn't work on the site.
There are a number of fix around options for Joomla to do with the editor, email masking, etc. They have worked on everything but the events I have listed.
Our website is www.projectsweetpeas.com
. You can see where the Paypal buttons are working here (http://projectsweetpeas.com/index.php/owens-miracle
) on the right side. But not in the JEvents here (http://projectsweetpeas.com/index.php/c ... Itemid=129
Hope that makes sense and that you might have an idea of how to fix this as we already have people trying to register.