replaced www.codeigniter.com with codeigniter.com
diff --git a/user_guide/installation/upgrade_153.html b/user_guide/installation/upgrade_153.html
index 33d3837..4a6dfc7 100644
--- a/user_guide/installation/upgrade_153.html
+++ b/user_guide/installation/upgrade_153.html
@@ -40,7 +40,7 @@
<table cellpadding="0" cellspacing="0" border="0" style="width:100%">
<tr>
<td id="breadcrumb">
-<a href="http://www.codeigniter.com/">CodeIgniter Home</a> ›
+<a href="http://codeigniter.com/">CodeIgniter Home</a> ›
<a href="../index.html">User Guide Home</a> › Upgrading from 1.5.2 to 1.5.3
</td>
<td id="searchbox"><form method="get" action="http://www.google.com/search"><input type="hidden" name="as_sitesearch" id="as_sitesearch" value="codeigniter.com/user_guide/" />Search User Guide <input type="text" class="input" style="width:200px;" name="q" id="q" size="31" maxlength="255" value="" /> <input type="submit" class="submit" name="sa" value="Go" /></form></td>
@@ -93,7 +93,7 @@
<a href="../index.html">User Guide Home</a> ·
Next Topic: <a href="../overview/at_a_glance.html">CodeIgniter at a Glance</a>
</p>
-<p><a href="http://www.codeigniter.com">CodeIgniter</a> · Copyright © 2007 · <a href="http://ellislab.com/">Ellislab, Inc.</a></p>
+<p><a href="http://codeigniter.com">CodeIgniter</a> · Copyright © 2007 · <a href="http://ellislab.com/">Ellislab, Inc.</a></p>
</div>
</body>