  We investigate how the topological charge density in lattice QCD simulations
is affected by violations of chiral symmetry in different fermion actions. To
this end we compare lattice configurations generated with a number of different
actions including first configurations generated with exact overlap quarks. We
visualize the topological profiles after mild smearing. In the topological
charge correlator we measure the size of the positive core, which is known to
vanish in the continuum limit. To leading order we find the core size to scale
linearly with the lattice spacing with the same coefficient for all actions,
even including quenched simulations. In the subleading term the different
actions vary over a range of about 10 %. Our findings suggest that non-chiral
lattice actions at current lattice spacings do not differ much for this
specific observable related to topology, both among themselves and compared to
overlap fermions.
