fixed a series of "next" and "previous" topic links that pointed to the wrong pages.
diff --git a/user_guide/installation/upgrade_160.html b/user_guide/installation/upgrade_160.html
index 8550768..f4e703e 100644
--- a/user_guide/installation/upgrade_160.html
+++ b/user_guide/installation/upgrade_160.html
@@ -116,7 +116,7 @@
·
<a href="#top">Top of Page</a> ·
<a href="../index.html">User Guide Home</a> ·
-Next Topic: <a href="../overview/at_a_glance.html">CodeIgniter at a Glance</a>
+Next Topic: <a href="troubleshooting.html">Troubleshooting</a>
</p>
<p><a href="http://codeigniter.com">CodeIgniter</a> · Copyright © 2006-2008 · <a href="http://ellislab.com/">Ellislab, Inc.</a></p>
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