Semiclassical background fields in SU(2) lattice gauge theory at temperatures below but close to the deconfinement transition are carefully (re) investigated. By the help of the 'cooling' method and analyzing the localization behaviour of the real modes of the Dirac-Wilson fermion operator we find evidence for (anti)selfdual Kraan-van Baal caloron solutions typically occuring with non-trivial holonomy.