Drag and drop in safari


I’ve a problem with drag and drop in safari. I’ve a component that i’ve to drag to a panel, it works as i expected, but the problem is when i drag a embedded (image type) component that is not supposed to be draggable.

In firefox when i drag a embedded component to my panel, it shows me the image in other tab, but in safari the application becomes unresponsive.

Any ideas of what is happening? how can i disable that behavior?