Whenever I "Save Settings" on the GF Notification page, my landing page is in the admin section of of my RivaSliderPro plugin (the first slideshow settings in) where I get the error "An unknown error has occurred. Please try again." (which is probably a Riva Slider pro error message).
I do not get this error when I save a form, only when I save notifications.
Otherwise both plugins run flawlessly. Using latest version of everything: WP 3.3.1 multi-site, GF 1.6.2, Riva Slider Pro 1.0.4. (http://rivaslider.com/)