I was using Slideshow 2.2.17 with WP 3.6 and Gravity Forms 1.7.8. I had to network deactivate Slideshow in order to be able to edit the fields of forms made through GF. I before checking plugins I did try emptying the cache, trying different browsers and browsers through different platforms. It was definitely this plugin not allowing me to edit the fields before. Just making the author aware and feeding Google about this problem.