DWR

http://www.nabble.com/Conversion-breakage-(Was:-ScriptSession-hack)-tc20812142.html

Solutions available in the thread above. Basically (uncommenting the proxied method check):

Changing line 740 of DefaultRemoter to

if (meth.getDeclaringClass().equals(obj.getClass()))
{
    return meth.invoke(obj, params);
}
else
{
    // A proxied object. Obtain the Method from the proxy
    Method m = obj.getClass().getMethod(meth.getName(), meth.getParameterTypes());
    return m.invoke(obj, params);
}