you've got symptoms that i basically have. doesn't hurt doing normal stuff like walking but, a little discomfort walking down stairs or up them sometimes. not to bad when doing squats, but, lunges are out of the question as well as running. anything where my right leg is supporting my body by itself, in a closed kinetic position.
had an x-ray done and discovered i have a bipartite patella (which isn't actually causing the pain, but can make you a little more prone to injury).
doc gave me some anti-inflammatories and i ice it once a day.
also got an appointment with an orthopedic in a couple of weeks.
found this article from alwyn's newletter that sounds close to my symptoms, but, gonna let the orthopedic make the call, since that's what i'm paying him to do.
http://www.stumptuous.com/pf.html