When you all say you put knives in the dishwasher, what type of knives are you talking about? Butter knives? Steak knives? Cutlery such as chef's knives, paring knives, etc? My steak knives and other cutlery specifically say not to wash them in the dishwasher because they can rust. I was a moran and did it anyway with my steak knives, and sure enough, rust spots began to develop after a few months. I have since sanded the rust off and now only hand wash/dry the steak knives and cutlery. Luckily this was a cheap Farberware set, so even if they had been ruined I wouldn't have been out much money.
On a related note, why is it OK to wash silverware in the dishwasher, but not cutlery? Aren't they all made from stainless steel?