“At this time, support for is available only when running on Windows with the latest Firefox browser or Microsoft Internet Explorer 5.0 or greater.”

I find it quite hard to believe that the service will work okay in IE 5.0 (released in 1999!) but not in nine years newer browsers like Opera 9.5 and Safari 3.

Has it been tested at all in Opera?

Depending on the response I get I may reveal which site the original message came from.