  The corrections to the MSSM Higgs boson masses and couplings performed in
this millennium are briefly reviewed. For the lightest MSSM Higgs boson mass,
m_h, we list the current status of the intrinsic uncertainties (due to unknown
higher-order corrections) and the parametric uncertainties (due to the
imperfect experimental knowledge of the input parameters). The need for
high-precision calculations in the MSSM Higgs boson sector is exemplified in a
realistic example.
