When trying to create a form, I get the error message, "Ajax error while adding field".
I've read through another post where someone had the same issue; that issue was solved by deactivating conflicting plugins. I don't have any plugins running other than Gravity Forms.
I think this issue is specific to the Thesis theme/framework. I notice the problem goes away when I switch to Twenty Eleven 1.3, so I upgraded my Thesis from 1.8.3 to 1.8.4. Even after upgrading to 1.8.4, the Ajax error message returns. I can't add any fields or forms.