Browser compatibility testing (in this case, for Spins pages)

[Mel Chua]

How do we do browser compatibility testing for Fedora webpages? I 
couldn't find notes for this on the wiki, but I may just be missing 
something.

The question that prompted this (from Sean Daly of the Sugar Labs 
project, copied):

 > [http://spins.fedoraproject.org/soas/] is not
 > showing any text on my old Mac
 > running a very old version of Safari (v1.3.2). Displays OK in Firefox
 > though. I don't suppose there is a plain-html version available, or a
 > way to warn users their browser is bad?

--Mel