\setbeamerfont{subtitle}{size=\normalsize}
% Frame bits
-\setbeamerfont{frametitle}{shape=\scshape,family=\rmfamily,size=\small}
+\setbeamerfont{frametitle}{shape=\scshape,family=\rmfamily,size=\tiny}
\setbeamerfont{footline}{shape=\scshape,family=\rmfamily}
% Use slightly more leading than normal.
% These are for "Theorem" et al.
\setbeamerfont{block title}{size={}}
+\setbeamerfont{proof title}{parent=block title,shape=\itshape}
% The references can be tiny.
\setbeamerfont{bibliography item}{size=\footnotesize}