Which version of Silverlight you are currently using? Does a basic test against a public site, like this Telerik demo site
, pass in Safari? If it's something specific to your app and it is publicly accessible, consider sending us the tests files so we can see the issue first hand.
Also, If you haven't done so already, please add the following line:
This should be the very first line of code in your test method.
One more thing I'd like to mention(one of our lead engineers just reminded me) is that it's kind of pointless testing a Silverlight app in multiple browsers. The same Silverlight engine (the same DLL's) are exercised no matter what browser you test in. If the app loads in the different browsers, that's all that matters for cross browser testing.
the Telerik team
Check out Telerik Trainer
, the state of the art learning tool for Telerik products.