Brought this up a bunch of times already. Nobody seems to care until it happens in their game.
It's the same issue as with the glowing enchantment table, Attunement sphere, Dawnbreaker, and a few other objects. Usually when one is glowing or discolored, they all are at the same time.
But hey, everyone keeps insisting that they didn't do anything to the graphics even though these issues weren't there in my game until after 1.4 when I was already 500 hours into the game.
I say it's BS. They did something either to it or to something that affects it.
all that stuff happened to me before any patches, it's off and on and still happens now, seriously it wasn't a patch that started this glowing object bug. As for turning the nightinggale stuff back to black, try dropping it, saving while its on the ground then restarting your ps3 and pick the stuff up again. It could also just fix by itself after a while