I had the same problem, it broke during the last update or two. A work around is to click up on the safari menu at the top and choose preferences, when the preferences open click hte Advanced button/tab at the top and then check the box to "show developer menu in menu bar" and close the preferences window. After that you will see the developer menu at the top, click the developer menu and under "user agent" pick something like Safari for iPad. I tried that and Internet Explorer 8.0 and only the iPad one worked with my bank website. You can play around and try others, not sure what the differences are but it is a work around until Apple fixes it.