Sorry to just add to this, rather than solve it, but I've had the identical problem this morning! Oh, and to make matters worse, mine's a built-in dishwasher and it seems to have been fitted with special tools (i.e. not using screws, but rather fittings with a proprietary sort of head on them) so I can't even remove it to get at the water inlet!  I hope someone out there will take pity on us ...
                 Sudsy
                
 November 2010