In reply to TheCragStallion:
I had a big fall last year (in January) - had lots of injuries - one of them was bilateral deep knee lacerations, so must have banged my knees pretty hard on the rock. I went back to running quite soon after the stitches were removed (stupid, but i was really bored as could not climb or work much due to the other injuries). My left knee clearly had something more wrong with it in the joint - I could run OKish but had lots of stiffness and pain afterwards and in general could not 100% straighten or 100% bend my knee - was just a few degrees off in both movements. This meant I could not kneel on that side or put weight directly onto that knee as it was too painful. My IT band was also palpable clicking over the knee when I bent it.
I was seeing a sports physio at the time for something else so asked her to take a look. She did some physio on it releasing up my popliteus muscle and also some work on my IT band. I also stopped running on it for a few months - and now, 1 year on, it is close to being normal again.
Not sure that is particularly reassuring or relevant - but I did manage an Alps trip on it last July.
(I did not see a doctor about it as couldn't face the battle of getting an appointment - but that was wrong of me.)