Originally Posted by: Andrew SaAny problem with cracks around a neck joint can potentially be a big one...I wouldn't go near that guitar with a 10 foot pole

I believe he said locking nut, not neck joint... but nevertheless I have managed to find out (the hard way) on how to put cracks in a guitar's neck at the locking nut and it isn't anything to worry about as long as the nut itself doesn't shake or rattle and it'll clamp down securely you don't even really have to fix it. However, if through normal use the cracks get any bigger that is when you should look into repairing it (or getting it repaired). Cracks don't get smaller with time.