Just saw this post. Didn't bother readingn down through the responses but sound like you need to lube up that nut!!! Big Bends Nut Sauce is a must. Your guitar should always have it on it.
This is my new LP Traditional Mahogany Satin. Got it a week ago and I'm in love with it. Kicked the crap out of the Standard I played on the same day in the shop, and 600 Euro cheaper!!!
:)