Ikea seems to be notorious for having parts missing when you open the box. We have a dresser in our house right now sitting without a knob because we didn't want to drive an hour back to the store. They try to place the burden back on customers by urging us to check all the parts before we leave the store. Why should we have to do that? It would be a huge pain, and you really don't know if you've got all the parts until you put it together. And in the act of pawing through everything there's a good chance you'll lose some pieces in the process.

On a related note, they are often out of stock on many items. This is frustrating when you drive a long way, especially if you do call first to check if something is in stock, and it still isn't.

Not that I don't still love Ikea :)