It's a long shot, but if you're just not getting in the front door, you might be able to trick the site into thinking you are using IE. You won't actually be using IE, but the site may see IE in the User Agent string you present and let you in to work on that form.





First go to Safari Preferences>Advanced and check the box to show the Develop menu.









Next open the Develop menu and go to User Agent and choose IE. Should probably use the latest, 9.0. Don't forget to set it back to the default when finished with that form--if it works.



