Mine squeaks..
Mine is the pin that secures the master cyl rod to the pedal.
My bushes were stuffed so I removed them; if i push the pin to the right the squeek stops; it then slowly works its way to the left again and starts squeeking.
Looking at the pin and pedal section the pin has placed a fair whack of a dent in the pedals metal due to almost 200,000km's (255,000km's total) of running heavy clutches.