Hiya!
I have one form (actually, _three_, as I've discovered during the process of writing this post) that is giving me this error. Other (gravity)forms on my site are working fine.
I've not moved hosts or domains recently, and the forms were working last week (the last time I checked this particular page).
So far, I've verified that the form is viewable using the "preview" page of the form builder, tried using the meta recovery plugin, deleting and rebuilding the page that the form resides on, changing whether or not the page is password protected (it should be), duplicating the form and attempting to embed the duplicate, renaming the form, and probably one or two other combinations that I'm not remembering right now.
Site: http://www.norwescon.org/
Original page in question: http://www.norwescon.org/get-involved/volunteers/volunteer-position-submission/ (current password is "temporary")
Pages that I just discovered are doing the same thing (ARGH!):
* http://www.norwescon.org/hotel/hotel-suite-request/
* http://www.norwescon.org/exhibitors/lobby-tables/
Other pages with forms that are working correctly:
* http://www.norwescon.org/about/contact-info/
* http://www.norwescon.org/special-events/gaming/scheduled-gaming-gm-registration/
Installation Status (copied from my Gravity Forms "settings" page:
* PHP Version 5.2.17
* MySQL Version 5.1.53
* WordPress Version 3.5
* Gravity Forms Version 1.6.11
Any assistance with this will be _greatly_ appreciated!