Sorry to bring up this old thread, but I figured anyone that bought one and is still subscribed (like me) might be interested:
Last week my HL-T6756W (the one from Costco) developed a "dead pixel" that was solid white. A week later, now I have 3, two white and one black. Doing a bit of research I found that it's a fairly common issue and will likely get worse.
I also read that there is a recall for this issue on certain Samsung models. The only recall I could find was regarding a class action settlement, but it said the issue covered was "a shadow along the edge of the display".http://www.samsung.com/us/dlptvsettlement/
My model is listed though, so I guess there is a chance it's covered. I just sent an inquiry about this to Samsung via their Customer Support Facebook page: http://www.facebook.com/samsungsupport
If there is anyone else that has encountered this, please let me know if you found out any options for getting it fixed without spending so much money that it'd be smarter to replace it.
Otherwise this has been a fantastic TV. I'm still on my first bulb, and I've only had to bump the brightness up once. Picture quality is as outstanding as the day I got it (except for the 3 dead pixels staring me in the face).
Also, as a public service announcement, if you do have the "shadow" problem above, it looks like you're good to go with a free repair.