I have an A201 (Gold Series with a serial number A0013, purchased about 4 years ago), and a 8 inch "crease" has appeared in the finish directly at the seam between the book-matched pieces of the back. It isn't so much of a crack, really, as it appears to be cosmetic (?), and does not extend to the edges of the guitar (it stops about 1-2 inches from both the guitars edges. There is no indication that the corresponding brace on the inside of the guitar is loose or damaged. I am the original owner and I baby the guitar, and keep it humidified and in the case at all times. No significant bumps, bruises or shocks have occured. My brother is a luthier and says this should be one of the strongest parts of the instrument, and it may be a glueing issue? Is there anything that can be done and would it be covered by warantee? I love the instrument and would hate to have the problem progress any further. Thanks!