diff --git a/functions/array.xml b/functions/array.xml
index 62cbad961b..0a8f7f0108 100644
--- a/functions/array.xml
+++ b/functions/array.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.145 $ -->
+<!-- $Revision: 1.146 $ -->
  <reference id="ref.array">
   <title>Array Functions</title>
   <titleabbrev>Arrays</titleabbrev>
@@ -1696,6 +1696,14 @@ echo "sum(b) = ".array_sum($b)."\n";
       </programlisting>
      </example>
     </para>
+    <note>
+     <para>
+      PHP versions prior to 4.0.6 modified the passed array
+      itself and converted strings to numbers (which most
+      of the time converted them to zero, depending on
+      their value).
+     </para>
+    </note>
    </refsect1>
   </refentry>