"TypeError: root is not a function" when click on item named "watch"

My firefox (17.0) raises an error wehn i click on the item named "watch". The following code demonstrates this behaviour:

``` javascript
$.contextMenu({
    selector: '.context-menu-one', 
    callback: function(key, options) {
        var m = "clicked: " + key;
        window.console && console.log(m) || alert(m); 
    },
    items: {
        "watch": {name: "Edit", icon: "edit"}
    }
});
```
