How bizarre! I've had a very similar problem with the same make/model of dishwasher, just this last week.
My electrics tripped and it turned out to be my d/w doing it. There's a puddle on my kitchen floor and the dishes are clean, but there's still water in the bottom of the machine, so I'm assuming it's near the end of the cycle.
I haven't had the chance to investigate yet, but if I find anything I'll post back.
Cheers
Joe, June 2008