This paper, joint with A. Deopurkar, establishes divisor classes of generalizations of the Maroni loci in Hurwitz spaces. Each branched cover of the projective line determines, via the Casnati-Ekedahl-Schreyer relative canonical resolution, a whole bunch of vector bundles. Each bundle has a splitting type. If we impose that the splitting is not balanced then we sometimes determine a virtual divisor in the corresponding Hurwitz space. What are their divisor classes? This paper computes these classes, at least in partial compactifications of Hurwitz space, and we discover a curious phenomenon -- for fixed degree and genus, all of them are proportional! (An intrinsic explanation is still lacking.)