\setbeamercolor*{section in head/foot}{bg=umbcyellow, fg=black}
\setbeamercolor*{subsection in head/foot}{bg=umbcyellow, fg=black}
-\setbeamercolor*{author in head/foot}{bg=umbcyellow, fg=black}
+\setbeamercolor*{author/framecount in foot}{bg=umbcyellow, fg=black}
\setbeamercolor*{title in head/foot}{bg=umbcyellow, fg=black}