--- a/day1/session1.tex	Sun Jan 10 23:09:00 2010 +0530
+++ b/day1/session1.tex	Tue Jan 12 19:03:34 2010 +0530
@@ -562,7 +562,7 @@
 What ipython magic command do you use to obtain the lines of code you have already typed in the interpreter? What command do you use to save them?
 \end{frame}
 
-\begin{frame}
+\begin{frame}[fragile]
 \frametitle{\incqno }
 The following code snippet has an error/bug:
 \begin{lstlisting}