[X4U] safari and wsdl

[Matt Gregory]

I apologize if this is a basic question, but Google isn't helping me
out on this one ...

I'm messing around with some Amazon web services and it's getting
annoying to have to switch to Firefox just to view the wsdl files. 
I'm assuming that Firefox is using a built-in stylesheet to make the
xml a little more pretty, but I don't know how to get Safari to do
something similar.  Here's an example wsdl:

http://webservices.amazon.com/AWSECommerceService/AWSECommerceService.wsdl

Displays fine in Firefox, but comes up as a bunch of squares in
Safari.  Anyone have any advice?

Thanks,
matt.