Index: doc/source/en/tsvn_server/server_apache.xml
===================================================================
--- doc/source/en/tsvn_server/server_apache.xml	(revision 3126)
+++ doc/source/en/tsvn_server/server_apache.xml	(working copy)
@@ -591,6 +591,23 @@
 			to reference <literal>DOMAIN\username</literal> as well.
 
 		</para>
+		<warning>
+			<para>
+				Make sure that the account on the server that Apache is running as
+				has an explicit entry in the repository directory's access control 
+				list (right-click directory | properties | security), with full 
+				control.  Otherwise, users will not be able to commit their changes.
+			</para>
+			<para>
+				Even if Apache runs as local system, you still need such an entry 
+				(which will be the Administrator account in this case).
+			</para>
+			<para>
+				If Apache does not have this permission set up, your users will get 
+				"Access denied" error messages, which show up in the Apache error log 
+				as error 500.
+			</para>
+		</warning>
 		<tip>
 			<para>
 				Subversion AuthzSVNAccessFile files are case sensitive in