I had this problem on same model. It looked like a leak from the door seal, but was actually leaking from the detergent tray, down and running around the door. A friend of mine who is a plumber suggested turning the water pressure down slightly via the main stop-cock or check valve on the water supply to the machine (to stop it rushing into the detergent tray) and checking that the machine is level.
I did both of these and the leak stopped.
C Martin
March 2008