Capitalize Valgrind to keep it consistent with the rest of the text.

ex8.tex

@@ -92,13 +92,13 @@ \section{How To Break It}
 
 \begin{enumerate}
 \item Get rid of the \verb|'\0'| at the end of \ident{full\_name}
-    and re-run it.  Run it under valgrind too.  Now, move the definition
+    and re-run it.  Run it under Valgrind too.  Now, move the definition
     of \ident{full\_name} to the top of \ident{main} before \ident{areas}.
     Try running it under Valgrind a few times and see if you get some 
     new errors.  In some cases, you might still get lucky and not catch
     any errors.
 \item Change it so that instead of \verb|areas[0]| you try to
-    print \verb|areas[10]| and see what valgrind thinks of that.
+    print \verb|areas[10]| and see what Valgrind thinks of that.
 \item Try other versions of these, doing it to \ident{name} and
     \ident{full\_name} too.
 \end{enumerate}

ex9.tex

@@ -73,7 +73,7 @@ \section{How To Break It}
 \end{enumerate}
 
 Try to come up with some other ways to break this, and as usual run all of
-these under valgrind so you can see exactly what is going on and what the
+these under Valgrind so you can see exactly what is going on and what the
 errors are called.  Sometimes you'll make these mistakes and even
 Valgrind can't find them, but try moving where you declare the variables
 to see if you get the error.  This is part of the voodoo of C, that