The following is produced by `beamer` version 3.41 with `enumerate`:

```
\documentclass{beamer}
\mode<presentation>
    {\usetheme{Rochester}}
\begin{document}
\begin{frame}
  \begin{enumerate}[(a)]
    \item Foo
    \item Bar
  \end{enumerate}
  \begin{enumerate}[1]
    \item Foo
    \item Bar
  \end{enumerate}
\end{frame}
\end{document}

```

[![enter image description here](https://i.stack.imgur.com/2z17D.png)](https://i.stack.imgur.com/2z17D.png)

And with `beamer` version 3.42 the following:

[![enter image description here](https://i.stack.imgur.com/znTXu.png)](https://i.stack.imgur.com/znTXu.png)

The latter output is so, well, ugly, that it's probably a bug. While waiting for a bug fix (?), how can I temporarily fix this so that I get the output produced by `beamer` 3.41?