--- a/text/intro.tex	Sun May 08 22:15:11 2011 -0700
+++ b/text/intro.tex	Tue May 10 18:08:26 2011 -0700
@@ -96,6 +96,9 @@
 
 The relationship between all these ideas is sketched in Figure \ref{fig:outline}.
 
+% NB: the following tikz requires a *more recent* version of PGF than is distributed with MacTex 2010.
+% grab the latest build from http://www.texample.net/tikz/builds/
+% unzip it in your personal tex tree, and run "mktexlsr ." there
 \tikzstyle{box} = [rectangle, rounded corners, draw,outer sep = 5pt, inner sep = 5pt, line width=0.5pt]
 
 \begin{figure}[t]

--- a/text/ncat.tex	Sun May 08 22:15:11 2011 -0700
+++ b/text/ncat.tex	Tue May 10 18:08:26 2011 -0700
@@ -495,7 +495,7 @@
 \end{scope}
 \end{tikzpicture}
 $$
-\caption{Five examples of unions of pinched products}\label{pinched_prod_unions}
+\caption{Six examples of unions of pinched products}\label{pinched_prod_unions}
 \end{figure}
 
 The product axiom will give a map $\pi^*:\cC(X)\to \cC(E)$ for each pinched product