Creaky Knee Syndrome

Actually there is not such a problem, but it sounds kind of cool..  After playing a lot of soccer my knees started making creaky sounds when I was going up the stairs.  I'm in good alignment, wear orthotics, etc.  so I wanted to know if I had any knee damage (specifically -wearing down the cartilage between the leg bones).  An x-ray revealed normal joint spacing.  Yeah!  The moral of this story is that joint noises aren't an indicator of joint damage.  I don't know if long term noises are associated with more damage, but I suspect this to be true.  I don't want to find out so it's time to take my glucosamine regularly and do my eccentric knee exercises.