jQuery UI library only works on Firefox?

jQuery UI library only works on Firefox?


I've tried the lastest jQuery UI demos and they all work fine on
Firefox/Camino. I can't however get some of them to work on Chrome,
Safari, or the latest Webkit build. The demos that fail are any that
deal with changing class such as switchClass or ToggleClass.
Is this a known issue? I was expecting to see a *few* cross platform
problems with a library like jQuery but it is a bit surprising that
several of the demo apps have trouble.
I'm using: Mac Powerbook 10.5.6 and latest build of WebKit
Scott