I'm running into several issues running Membership with Gravity Forms.
Firstly, when Membership is active, Gravity Forms' form builder doesn't work. Clicking a a field to add just does nothing.
Also, any admin screens related to post types are just a white screen. This includes edit.php and post-new.php. edit-tags.php is OK.
The issues go away when either Membership or Gravity Forms is disabled.
Also, installing the WPMU Dev Dashboard breaks the entire admin area.
I've tried Repairing Membership Tables, but it didn't help.
I'm running the latest version of WordPress, Gravity Forms and Membership.