In an ondragstart handler, calling setDragImage with a child element results in an empty element being dragged around.
Created attachment 9503 [details] Test case showing empty element during drag. This is a sample HTML file that demonstrates the problem. Of course, it's always possible I'm insane and not calling things correctly. To reproduce: click on the empty area beside either Line 1 or Line 2 and hold, then drag. You should see an empty yellow div as you're dragging around.
(In reply to comment #1) > To reproduce: click on the empty area beside either Line 1 or Line 2 and hold, > then drag. You should see an empty yellow div as you're dragging around. Um... that should be a _red_ div.
For another example that looks similar, see bug 5054.
I can't see an empty yellow (or red) div as I drag on any of Safari, Chrome, or Firefox. Not sure if this is still an issue, or if the test is out of date.