Thought that I might as well keep you updated on this matter.
Thanks to Allen for the links. I think my power clean have been aggravating the tendonitis. Knees far forward, ass flat... Just like he showed the wrong way in the video. Ice and (even more) fish oil have been helping too.
Anyway, there's no more pain below the patella, but there's some BEHIND the knee.
Is it possible that high heeled oly shoes might cause this and the tendonitis? I have Do-Win's that have 4cm heel. Yesterday I squatted and did clean pulls with flat heel wrestling shoes and there was nearly no pain at all and I felt more stable.
I think it's time to buy new shoes.