Last night, I was stringing a bass with a slightly heavier gauge G string. The slot in the nut was too narrow, so the string lay on top.

Out of curiousity, I gently pressed down to see if I could make it fit in there, and BING! a piece of the nut flew across the room! Good thing my eye wasn't in the way. I've been playing for nearly 39 years, and this was a first for me. The string does now sit where it's supposed to, and seems stable, but obviously I have to make a trip to my repair guy. How annoying.
