Thought this might be helpful if anybody else has run into the same issue. I was having a problem with horizontal lines slanting down about 1/4" from left to right. I had a tech come out today to take a look at it since its under warranty. I told him about what cecilnyr had posted when he had the same issue, about how it was an issue with a spacer on the mirror. The tech kept telling me theres no way thats the issue, blah blah blah. He took the TV almost completely apart, couldnt find anything wrong, and eventually decided it need a new optical block, basically the entire lens assembly. I told him to forget it, I would just exchange the TV since its still within my 30 days since purchase. After he left, I opened up the round door on the right side of the TV and messed around with the spacer. I'm happy to report that it cost me one small piece of styrofoam to fix the issue. I stuck a piece in there between the mirror and the spacer and voila, problem solved. Thanks for nothing repair guy.
In short, too late I know, if you have this same issue its an easy DIY fix.