every dishwasher manual will tell you handles down except items like sharp knives, whick should always be handle up.
I suppose if your knives are blunt then it doesn't matter. I keep mine very very sharp.
They have manuals? Anyway, I dont really see what difference it makes unless you are in the habit of sticking your hand into the dishwasher before removing the cutlery basket. Have had the ends of knives chop out the little mesh at the bottom of the basket in the past, and those things are a pain to source a new one of that will go into the dishwasher (sure, could use any random one but it wont go in as nicely) - I wanted a second one for clean and dirty so that I didnt have to unload it before being able to start loading another one and it was expensive and took weeks to get so I treat them really nice now. No knife in contact with the basket.