Fix two incorrect figure references

errata.tex

@@ -8,6 +8,8 @@
 \section*{Errata}
 \begin{itemize}
   \item Page 24, equation: $\textbf{\emph{this}}~\cup$ should be $\{ \textbf{\emph{this}} \}~\cup$.
+  \item Page 104, Section 4: reference to Figure 4 should be to Figure 3 instead.
+  \item Page 121, Section 6.2: ``Figure 4 and Figure 4'' should be ``Figure 3 and Figure 4''.
   \item Page 160, before Section 4.1: \textsc{Value} should be \textsc{Load} (two occurrences).
   \item Page 196 and 197: incorrect chapter title in page header.
 \end{itemize}

papers/multiplicities.tex

@@ -754,20 +754,15 @@ \section{Multiplicities for Java}
 
 \begin{figure}[b!]
 \begin{CenteredBox}
-\begin{threeparttable}
   \begin{tabular}{cc}
     original (without using multiplicities) & using multiplicities \\
     \hline
     \scalebox{0.8}{\usebox{\lstboxleft}}&%
     \scalebox{0.8}{\usebox{\lstboxright}}\\
   \end{tabular}
-  \begin{tablenotes}
-    \small
-    \item \caption{Example of implementing class \inline{Subject} of the Observer
-      Pattern, with and without using multiplicities (differences highlighted)}
-  \end{tablenotes}
-\end{threeparttable}
 \end{CenteredBox}
+  \caption{Example of implementing class \inline{Subject} of the Observer
+    Pattern, with and without using multiplicities (differences highlighted)}
   \label{figure3}
 \end{figure}