I just got my new replacement motherboard from Newegg (Asus A8N-SLI Premium), as the other one died for some unknown reason, and upon mounting it in the case I noticed it was slighty warped on one corner. It's not too bad I guess, about 1/8 of an inch or so, but after purchasing a half a dozen mobos in my time this is the first one that arrived warped. It POSTed ok and there were no visible signs of cracking but is a warped mobo detrimental to its long term reliability and thus something I should be worried about?