Lots of posts if you do a Google search. lamps, ballast boards, DLP engines, total rebuilds, poorly assembled thermistor sensors, air flow problems, even chasis problems.
778 posts at CNET.
http://forums.cnet.com/5208-7596_102-0.html?forumID=60&threadID=257865&start=0&tag=forum-w;forums06
That is just a small sample of other problems people are reporting. I don't know of any other TV line that has been plagued with this many problems.
I have bought 3 Mitsu TVs in the past 10 years. I am currently in the market for another TV, but don't think it will be Mitsu.
I currently have about 300 hours on a 2 year old WD-62628 Mitsu DLP, and the repairman is coming next week. This TV doesn't get a lot of use, I am a little disappointed in that, not that I don't think everyone manufacturers a lemon once in a while. I was surprised when I started researching the problem, how many people are having problems.