JS binding re-evaluation not working anymore

function checkModifiedSettings()
    {
        if( typeof settingsList.model == "undefined" || settingsList.model == null )
        {
            console.log("WARNING : checkModifiedSettings settingsList.model is not defined!");
            return false;
        }

        for(var i=0;i<settingsList.model.count;i++)
            if( settingsList.model.get(i).modified )
                return true;

        return false;
    }

enabled: checkModifiedSettings()