I had the same problem. I took off the back and the top of the machine(unscrew top and gently prise off). I then turned the machine on and took it through its cycles one by one. The leak began very gently straight away and came from under the drum. I drained the water. All dispenser and pump connections were fine. After leaning the machine to one side I noticed a small black wax like plug on the plastic side of the drum. The water was coming from there. I took it off and there was a hole there. I filled it with silicone sealant let it dry overnight and ran the machine again. It fixed it.
I fear the plug was put there when the machine was made. A form of planned obsolescence!! (2 years). Am I being cynical!!!
Ivan
September 2010