  In the composite fermion model of the fractional quantum Hall effect,
composite fermions experience, in addition to the usual potential disorder,
also a magnetic flux disorder. Motivated by this, we investigate the
localization properties of a single fermion in two dimensions, moving in the
presence of both potential and magnetic flux disorders, but with a non-zero
average magnetic field. It is found that the exponent characterizing the
divergence of the localization length is not changed upon the addition of the
flux disorder, provided it is not too large, suggesting that the transitions
between fractionally quantized Hall plateaus belong to the same universality
class as those between the integrally quantized ones.
