I had this problem. It wasn't at all clear how to get the drip tray or drain pan out, or whether it came out at all. Looking underneath, there was a pad of black styrofoam-y material which made me think it might be kind of glued in place.
So I first got as much of the smelly water out using a turkey baster with a handy bit of thin plastic tubing taped on its end to make a long, flexible nozzle. You could make one out of gaffa tape - after all, you're going to lob it away afterwards!
Then a bit of combined wiggling and gentle pulling and out it came, there was a small, horizontal, forward-facing (i.e. away from me, looking in at the back opf the fridge) plastic peg that fitted into a plastic socket mounted on top of the compressor. the styrofoam pad was there to add a bit of friction, I think, for a tight fit.
The rest was easy: clean, throw away all contaminated stuff, refit, shower, well-deserved cold beer. Didn't have to switch off fridge; no electrical work involved - though if I couldn't have sucked up the water first, I'd have unplugged, in case of spillage.
Johnnymachine
July 2010