I just took my back-up bass out of a closet where it has been standing upright in it's case (unused for about 6 months) and noticed that all of the frets from about the 3rd fret on through the 15th fret are pulling out of the ebony board, in some cases the wood adjacent the fret is "bubbling" along the length of the fret - looks bad. The frets are up so high that I can get a fingernail under the fret on both sides. The bass is roughly 15 years old, so it should be stable. I bought it used a couple of years ago, so I don't know whether the frets are original. Anyone have any idea what is going on - the closet is in an air-conditioned home, so no temperature extremes, and dry (too dry maybe)? More importantly, anyone know how I can fix this problem and can I do it myself? The bass is currently unplayable, since the frets are all at different heights.