diff --git a/system/libraries/Controller.php b/system/libraries/Controller.php
index 0b34465..1b9a42a 100644
--- a/system/libraries/Controller.php
+++ b/system/libraries/Controller.php
@@ -84,6 +84,15 @@
 		else
 		{
 			$this->_ci_autoloader();
+			
+			// sync up the objects since PHP4 was working from a copy
+			foreach (array_keys(get_object_vars($this)) as $attribute)
+            {
+                if (is_object($this->$attribute))
+                {
+                    $this->load->$attribute =& $this->$attribute;
+                }
+            }
 		}
 	}
 	
diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index ab93381..89276e2 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -123,7 +123,8 @@
 	<li>Fixed a bug in the clean_email() method of the Email class to allow for non-numeric / non-sequential array keys.</li>
     <li>Fixed a bug in Pagination to scan for non-positive num_links.</li>
 	<li>Fixed a bug in the typography helper causing extraneous paragraph tags when string contains tags.</li>
-	<li>Fixed a bug in the Encryption Library to support modes other than MCRYPT_MODE_ECB</li>    
+	<li>Fixed a bug in the Encryption Library to support modes other than MCRYPT_MODE_ECB</li>
+	<li>Fixed a bug (#3175) preventing certain libraries from working properly when autoloaded in PHP 4</li>
 	<li>Fixed an example of comma-separated emails in the email library documentation.</li>
     <li>Fixed an example in the Calendar library for Showing Next/Previous Month Links.</li>
     <li>Fixed a typo in the database language file.</li>