This just happened with a UN55D6050 I purchased at BJs during the week. It had one dead pixel. I exchanged it right away.
I think its unacceptable. I paid for 2073600 pixels, not 2073599.
I took it right back to BJs, said it had one dead pixel, and exchanged it no problem for a set that was perfect.
Why live with it? I have never come across a store that wouldn't let you exchange a tv for dead pixels.
It bothers me when people say a dead pixel is normal, or to be expected. Its not "Normal" Pixels aren't supposed to be "dead".
The consumer is not supposed to accept a few dead pixels. Some companies that make the panels allow one or two dead pixels past quality control for cost purposes. That could be a "normal" practice for a company but you as a consumer have every single right to get what you paid for. If a set claims "1080p" and you have a dead pixel, you technically don't have a 1920x1080 set.
It's a defect. Don't allow a company to tell you that because there business practice accepts the defect as normal, that you and your hard earned money has to as well!
Any store would be happy to exchange it. Thats why I would rather take it back to the store then deal with the manufacturer. Maybe if enough sets get returned, companies will re-think there quality control.