I have read some of the other topics and I believe I have experienced a similar error when using conditional logic in my form. I have deleted the browser cache and restarted the browser many times. I have also updated to the newest version ( 1.6.4.1.1 ) of gravity forms. The only add-on I am using is the Authorize.net add-on for word press plus a handful of other non-related plug-ins. I cannot disable the other plug-ins. Here is link to the page that the form is not showing on.
http://mhmi.net/website-information-form/
I will be adding an SSL certificate to the page after I get it working correctly.