long frets

Take it to a tech.

This is a seasonal/environmental problem. The wood in the neck looses moisture in a dry environment and contracts. The remedy is to file the fret ends and polish the bevel.

If the guitar is neck-through or a set neck the areas of the body that could be injured are masked off. The neck on a bolt-on can be removed making the job a little easier. A file is gently run along the length of the neck trimming the ends flush with the edge of the fingerboard. Then the beveled ends of the frets are polished with a small needle file or a fine three corner file. Care should be exercised not to damage the fingerboard when polishing the bevel or eliminating any burrs that result from trimming and polishing. Any scratches in the lacquer that happen as a result of trimming the ends can be rubbed out with 400 and 600 grit wet or dry papers, followed up with various polishing compounds.

Hopefully this is a little more helpful.

I'm not going to be brave enough to do this for a while, but my new MIM Jazz has this problem and I'll probably look into it someday. I'd rather do it myself, but for now, don't have the right polish to replace any finish I take off the fretboard in the process. I'd also need to get a file or two.

I see there are multiple approaches (different types of files) to trim-off the end of the fret-wire, but has anyone used a Dremel for this? It seems like the Dremel would provide more precision, but I've not heard anyone mention the Dremel in conjunction with frets sticking-out of the edges.

If anyone has used a Dremel to do this, I'd be interested in what tool they used.