Index: docs/manual/mod/mod_env.xml
===================================================================
--- docs/manual/mod/mod_env.xml	(revision 641079)
+++ docs/manual/mod/mod_env.xml	(working copy)
@@ -72,6 +72,11 @@
     <example><title>Example</title>
       SetEnv SPECIAL_PATH /foo/bin
     </example>
+  <note type="warning"> This directive runs late during request processing
+  meaning that directives such as <directive
+  module="mod_setenvif">SetEnvIf</directive> and <directive
+  module="mod_rewrite">RewriteCond</directive> will not see the variables set
+  with it. </note>
 </usage>
 </directivesynopsis>