Any suggestions on this? Even though my proxy settings are SAVED in System Preferences (and I verified they are in Keychain AND are set to allow all apps to use), I get this stupid pop-up all day long. It seems to happen any time I go to either a new website OR a site has ads that are from a site I haven't visited. It's driving me insane! Worst part is it affects all three browsers I use (Safari, Firefox, Chrome) - Safari "works," but only after driving me insane with having to type the username and password multiple times, usually 3; Firefox and Chrome do let me save the password (Safari won't), but nothing ever loads correctly in either of those. This is the first Mountain Lion Mac in our building - everything on SL and Lion work perfectly. Suggestions? EDIT: Funny part is my SECURE proxy saves and works perfectly... just not HTTP.