  The violation of the third law of thermodynamics for metals described by the
Drude model and for dielectrics with finite \DC conductivity is one of the most
interesting problems in the field of the Casimir effect. It manifests itself as
a non-vanishing of the entropy for vanishing temperature. We review the
relevant calculations for plane surfaces and calculate the corresponding
contributions for a ball in front of a plane. In this geometry, these appear in
much the same way as for parallel planes. We conclude that the violation of the
3rd law is not related to the infinite size of the planes.
