rem: if (aDragSession.sourceDocument == aEvent.view.document) 
add:  if (aDragSession.sourceNode == aEvent.target) aDragSession.canDrop = true;   if (!aDragSession.canDrop) 
context: function tabdnd_dover (aEvent, aFlavour, aDragSession){    if (aEvent.getPreventDefault())        return;    if (aDragSession.sourceDocument == aEvent.view.document)    {        aDragSession.canDrop = false;        return;    }}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/9421/16ec0dd056fe66350dbfd2db3d2c89bf59f238ea/static.js/clean/extensions/irc/xul/content/static.js