Sometimes good things happen.
I've spent months, months trying to figure a way around the netWindows table-dragging bug in Gecko. I have assumed for some time now that the problem is in the lookup functions that NW uses in order to keep track of components. Last night, a friend of mine (a DOM newbie) wanted help with some DOM stuff, and so I oblidged him and walked him through some simple dragging stuff. He too came across the dragging bug, but wasn't using any of the complex object lookup routines that netWindows uses. I was looing in the wrong place. It wasn't the lookup, it was the table. Placing the table in a div, and moving the div solves the problem.