When using GWT 2.0.x and SmartGWT 2.2 Code as simple as:

public class SmartGwtTest implements EntryPoint {    
    public void onModuleLoad() {  
        IButton button = new IButton("say hello");
    }
}

will generate the exception.

com.google.gwt.core.client.JavaScriptException: (null):

This only happens in hosted (devmode)

ant hosted

I also suspect that maybe the GWT Development Plugin might have something to do with it.

Have you found a similar problem? How did you solve it?