When this plugin is enabled (i.e. when JS is enabled in the browser), it would be nice to hide the 'order' column since it no longer serves much purpose. With at least Trac 1.0, there seems to be a conflict: when items are reordered with the select box, the order updates correctly but it is no longer possible to reorder the items by drag and drop.
Possibly related, the following errors are seen in the JS error console on Chrome 21 when re-ordering with either the selects or by drag and drop:
Uncaught TypeError: Object function (a,b){return new p.fn.init(a,b,c)} has no method 'curCSS'
It would also be useful to provide a tooltip indicating that the items can be reordered by drag and drop.