Whilst I agree that a fresh lick of paint would do wonders, I think the current site (viewed in Fx3.5 here) looks more professional.
If there are Smarty templates involved, is it possible to set the templates directory to a different target for recognised legacy browsers? Sure, it's an extra set to maintain, but in the long run, probably easier to do so than trying to do it all in the one template and satisfy every browser and quirks mode in regular circulation.
And the legacy site would render better on some phones.
jJ
