Pulling the 'VOL FILL' fuse to get round a tank shutting off early.... and then forgetting to refit it, will end up with a nice puddle on the floor
Another possibility could be a failed tank vent valve, often seen as a fuel vapour trail from a surge tank after takeoff.
Sometimes the float switches in the surge tanks can't respond quickly enough to shut the refuel valves as the capacity is only about 11 galls.
JFI many moons ago when SAA were not allowed to overfly Africa we used to station one person on each wingtip during refuel (to listen for when the fuel was entering the surge tanks) and fill the aircraft to the gunalls (sp?) including the surge tanks!!! mists of time but if he wasn't airbrne within about 20 mins of departure he had to come back to be refueled
edit to add... just seen the picture as !!!!!!!!!!!!!! was down yesterday. that is a good indication of a broken vent valve
