some user guide corrections in code examples
a minor grammar tweak
diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index d23d920..ebff623 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -69,6 +69,11 @@
 	</li>
 </ul>
 
+<h3>Bug fixes for 1.7.3</h3>
+<ul>
+	<li>Fixed or clarified assorted user guide typos or examples.</li>
+</ul>
+
 <h2>Version 1.7.2</h2>
 <p>Release Date: September 11, 2009<br />
 SVN Revision: 1737</p>