I am unable to edit forms using v1.7.5. None of the fields respond and I don't get the blue shading when I hover over the field. My development site, which is experiencing this issue is using WP v3.5.1 and Gravity Forms v1.7.5. On my production site I am able to edit the same forms with no problems. My production site is running WP v3.4.1 and Gravity Forms v1.6.8.1. Since I am able to edit forms on the production site I don't think this is a local issue (browser, user error).