LOL ! Am I the only one who when he sees a member post something like that gets nervous because he's obviously done something wrong that he's feeling guilty about and I haven't managed to find it yet ? That was a good one Todd, made me laugh right out loud !
The toning is on the sides that faced the cardboard when the holder originally displayed an obverse and a reverse. In this case, the toning is (in my opinion) not distracting and almost attractive. The oooooold Dansco folders (not albums) had red cardboard that toned the back sides and ugly muddy red-brown color.
In his book, Encyclopedia of the Commemorative Coins of the United States, Swiatek discusses the values of original mint packaging for many of the issues.