This might not exactly be the place for this post, but it is on a fixie....so...
I was riding along the other day, and I noticed that I was getting a slight pop somewhere in my drivetrain. Nothing to really throw me off, but I started to worry that this was one of those insidious things that doesn't seem like a big deal until the pedals fall off. I tracked it to the crank, and when push or pull on it laterally it shifts a very little bit.
Has this happened to anyone else? I'm sure this is very basic mechanics, but I'd rather not take this apart down to the bearings looking for the problem when all I really had to do was tighten a ring. Any thoughts would be helpful.