Having just looked at my washing machine, with exactly this problem, I have found that TALBERT is dead right - split dispenser hose. Looks to be caused by the placement of a sharp metal piece right next to the hose, almost purposefully placed to cause a leak after just a couple of months of use. Good old Beko WMA767 washing machines (beware!). Just have to find a replacement part now....
Richie, October 2008