Positioning defect on WebKit with MooTools

				<img id="img" src="grass.jpg" alt="Square grass image"/>
				$(id).makeDraggable({
					grid : 20,
					onDrop : function() {
						$('top').set('value', " " + $(id).getTop());
						$('left').set('value', " " + $(id).getLeft());
					}
				});
		

Top : Left : Padding : Border : Margin :