Frustrating knee pain (argh.)

[Zen]

Fit & Float

[TsPoet]

Fit & Float

+1
if tightening your shoes did it, sounds to me like you need more float.
Fit never hurts.

[Julibird]

fit+float...and arch supports in your shoes and Speedplay cleats and pedals. That does the trick for me. I too used to keep my SPDs loose - until one fell off! Lovin' my Speedplays. If you wear an orthotic for running or other sports, don't forget to use them in your bike shoes too.

Good luck!