  We discuss the factorization breaking effects caused by the contribution to
large rapidity gap events from DIS on secondary reggeons. Based on the
triple-Regge phenomenology of hadronic diffraction dissociation, we present
estimates for the flux and structure function of the f reggeon. The kinematical
x_Pom-beta correlation is shown to modify substantially the observed x_Pom
dependence of the diffractive structure function. The secondary reggeon and
x_Pom-beta correlation effects explain the recent H1 finding of the
factorization breaking and resolve the apparent contradiction between the
preliminary H1 results and predictions from the color dipole gBFKL approach. We
suggest further tests of predictions for diffractive DIS from the gBFKL
approach.
