Asterisk Appliance's Web GUI Problems

I had the privilege of using the Asterisk Appliance web gui the other day (AA50). I found it a little odd. The manual said that Firefox was the recommended browser but it didnt mention which version. Im using Firefox 3 and all the knob and switches wasnt working too well. In the extension menu where you create users and edit users there is a box with all the users in it and you can click on one to load up that user's info. But when you click on one user all the users get highlighted and in turn no user's information is loaded. I automatically knew it was a browser issue and switch to IE7. This section worked in IE7 fine. So im going along editing and adding users then I wanted to an additional Service Provider to add in more POTS lines. When I click on this menu in IE7 the right panel kept on scrolling "Loading...". Thinking to myself, "ok, its loading....Ill sit here for a second or a few minutes". Nothing happened, another browser issue? Going back to Firefox and clicking on the same link the Service Providers page works and I can add/edit stuff. What ever happened to browser testing?