diff --git a/appendices/about.xml b/appendices/about.xml
index d8b1fee422..205fc7146d 100644
--- a/appendices/about.xml
+++ b/appendices/about.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.40 $ -->
+<!-- $Revision: 1.41 $ -->
 
 <appendix id="about">
  <title>About the manual</title>
@@ -281,6 +281,12 @@ Returns the length of string.
    is 4.3.x). Most of the time, this is not an error in the documentation.
    Explanation is often added for features not available in the current
    PHP release, but which will be available in a known future PHP version.
+   Typically, PHP only adds new features in major releases otherwise only bugs
+   are fixed. Using the A.B.C versioning format, a major release increments A 
+   or B whereas minor releases increment C. So for example it's not uncommon 
+   for a feature to be documented as available in PHP x.1.x when the latest 
+   release is PHP x.0.x. Also note that the manual is written in present 
+   tense, not future tense.
   </para>
   <para>
    Many times the PHP manual lists "Default Values" for PHP directives. These