pain behind the kneecap is probably chondomalacia (I think) which is just inflammation of the inside of the knee cap... I had it after switching shoes/pedals and riding much farther than usual... my doctor's prescription: make sure saddle is high enough... if in doubt, err on the high side... make sure legs are in good position... and take two aleve in the morning and two with dinner unti lthe pain goes away. He also told me to only ride 15 miles at a time for a little while untilthe pain goes away.

Rock