My site is running WordPress 3.5 RC3 and the latest version of Gravity Forms. I deactivated all other plugins and activated the Twenty Eleven theme. Some forms display without any problem. Others do not. The content is in the source but is not displayed on the page. Same forms cannot be previewed either. I have a link to a screenshot of a page where a form should in a Chrome browser with the Developer Tools Java Console open with javascript error:
http://screencast.com/t/canVeFMyv
Same form will work on WordPress 3.4.2. It looks like a possible issue with jquery and the conditional logic script?