its bad intonation. i havent set it up properly since i restrung it with a heavier gauge, but i've been waiting to get a new nut so that i can get file the slots perfect because the but on there at the minute is a bit screwed up.
i litterally put this together in like 30 mins though. once i get the guitar setup and my recording gear i'll record again on cubase. i dont like garage band!