[widgets] Implementing the Storage Event for widget preferences

Hi,

In my attempt to get our conformance level from 97% to 100%, I've been trying to implement the Storage Event requirement for widget.preferences in the Widget API spec [1]. I'm using the following JS code injected into the widget page to raise the event:

 [89] var evt = document.createEvent('StorageEvent');
 [90] evt.initStorageEvent('storage',false,false,key,old_value,new_value,window.location,widget.preferences);
 [91] window.dispatchEvent(evt);

However, in Safari I get "Test did not run or storage event was never fired."

In Firefox 3.6, I get "Test setItem-fires-event failed by throwing the following exception: [Exception... "Operation is not supported" code: "9" nsresult: "0x80530009 (NS_ERROR_DOM_NOT_SUPPORTED_ERR)" location: "http://localhost:8080/wookie/shared/js/wookie-wrapper.js Line: 89"]"

In Opera 11.50, I get "Test setItem-fires-event failed by throwing the following exception: Error: WRONG_ARGUMENTS_ERR"

Any pointers?

Thanks,

S

[1] http://www.w3.org/TR/widgets-apis/