Problem when redefining commands like \emph with \renewcommand
I am using the Beamer class and would like to redefine \emph to use \bfseries instead of \itshape. I have tried the following command:
but gets the following error
! LaTeX Error: Command \beamerx@\emph already defined. Or name \end... illegal, see p.192 of the manual.
I was told that this could be a possible bug. See