I just changed the strings on my 79 iceman and suddenly the 9th fret on the G string is crapping out on me. It will make a buzzy note if I push as hard as I can. But normal fretting pressure only frets out completely (or notes the 10th fret if I raise the bridge real high). I've tried adjusting the bridge height and truss rod in both directions with no avail. There is a small amount of fretware under the g string on the 9th fret, but really not much more than the rest of the fret. And nothing seems abnormal about the 10th fret. All the frets are still in really good overall condition. The 9th fret g string will sound normally if I give it a full bend.