I wondered about G&L's 90-day warranty on birdseye maple necks, too...especially since it's an upgrade that adds a few hundred bucks to the base price. It's an exception to their otherwise 10-year warranty against defects in materials/workmanship on the guitar.

In any case, I had 2 G&L's with those necks -an ASAT Semi Hollow that now belongs to CB and a Comanche that a currently banned fretter bought from me & neither ever posed a problem.