Originally Posted by
frankenmike
Could be just the plastic/rubber seals on the bearings squeaking. If so, should disappear eventually.
This solved a otherwise unfindable squeak for me. If you're unwilling to wait for it to wear in (I wasn't) you can get yourself a tube of ProGold lube, or any other that has a "hypodermic" type applicator and put a drop or 2 on the seal by putting the applicator into the BB assembly where the spindle comes out.
Solved the problem for me right away on a Campy Centaur square taper BB.