Callback utility "onJavascriptReady " is not working properly as it seems call to applet from JavaScript function is made even before applet is ready. As a result JavaScript error is getting thrown when any applet method is tried to be called from JavaScript
Issue can be seen with FX2.1 also
Steps to reproduce:
1) Install latest promoted or nightly build of FX2.2.
2) Clear deployment cache and try to load following applet
http://sqeweb.us.oracle.com/deployment2/jitu/plug-bug/javafx/callback/html/testJStoJavafx_Call_OverloadedMethod_int_ArgCallback.html
On IE we can see JavaScript error against statement "testApplet.callFromJS(47)"
"Object does not support this property or method
while on firefox following JavaScript error is getting thrown
"testApplet.callFromJS is not a function"
4) Close browser and clear deployment cache
5) Now try to load following html page using same applet but not using callback utility "onJavascriptReady"
http://sqeweb.us.oracle.com/deployment2/jitu/plug-bug/javafx/callback/html/testJStoJavafx_Call_OverloadedMethod_int_Arg.html

This time "testApplet.callFromJS(47)" does not throw any error and we can also see following inside plugin trace
>>>> int args called 47

Also reloading the page under #3 or loading it again without clearing the cache ,works sometimes