diff --git a/appendices/wrappers.xml b/appendices/wrappers.xml
index e6e5874980..4d6eb3e899 100644
--- a/appendices/wrappers.xml
+++ b/appendices/wrappers.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.65 $ -->
+<!-- $Revision: 1.66 $ -->
 <appendix id="wrappers">
  <title>List of Supported Protocols/Wrappers</title>
  <para>
@@ -618,7 +618,15 @@ X-MyCustomHeader: Foo
   <simpara>
    <filename>php://stdin</filename>, <filename>php://stdout</filename> 
    and <filename>php://stderr</filename> allow access to
-   the corresponding input or output stream of the PHP process.
+   the corresponding input or output stream of the PHP process.  The stream
+   references a duplicate file descriptor, so if you open
+   <filename>php://stdin</filename> and later close it, you close only your
+   copy of the descriptor--the actual stream referenced by
+   <constant>STDIN</constant> is unaffected.  Note that PHP exhibited buggy
+   behavior in this regard until PHP 5.2.1.  It is recommended that you simply
+   use the constants <constant>STDIN</constant>, <constant>STDOUT</constant>
+   and <constant>STDERR</constant> instead of manually opening streams using
+   these wrappers.
   </simpara>
   <simpara>
    <filename>php://output</filename> allows you to write to the