I guess my favorite lunar anomalies are to do with the many bizarre backgrounds of the Apollo frames.
IMO, these are clues to something much bigger than simple "scratches" or image "defects" or "pixelation".
Classic example:
https://i462.photobucket.com/albums/qq348/majorion/as17-134-20382_enhanced_2.jpg
Above is an enhanced image of course, but needless to say, the apparent 'architecture' in the background definitely shouldn't be there. All you do is turn up the gamma and contrast a bit, and you'll confirm it's there.
Original HiRES image: http://spaceflight.nasa.gov/gallery/images/apollo/apollo17/hires/as17-134-20382.jpg (2.2 M)"
ref: here
-- Frutty