diff --git a/doc/org.eclipse.cdt.doc.user/concepts/cdt_o_build_conc.htm b/doc/org.eclipse.cdt.doc.user/concepts/cdt_o_build_conc.htm
index 060013e61cb..d2351efb48b 100644
--- a/doc/org.eclipse.cdt.doc.user/concepts/cdt_o_build_conc.htm
+++ b/doc/org.eclipse.cdt.doc.user/concepts/cdt_o_build_conc.htm
@@ -14,7 +14,6 @@
 <p>This section describes the build views and terminology.</p>
 
 <img src="../images/trans.gif" border="0" width="25" height="1" alt=""><a style="text-decoration:none" href="cdt_c_build_over.htm">Building C/C++ Projects</a><br>
-<img src="../images/trans.gif" border="0" width="25" height="1" alt=""><a style="text-decoration:none" href="http://dev.eclipse.org/viewcvs/index.cgi/~checkout~/cdt-home/user/Reference%20Documents/Managed_Build_21/Managed_Build_Extensibility.html?cvsroot=Tools_Project">Manage Build Extensibility Document</a><br>
 
 
 <p><img src="../images/ng00_04a.gif" ALT="IBM Copyright Statement" ></p>
diff --git a/doc/org.eclipse.cdt.doc.user/reference/cdt_u_mprop_macros.htm b/doc/org.eclipse.cdt.doc.user/reference/cdt_u_mprop_macros.htm
index 5e76c4af88c..a088c4170ac 100644
--- a/doc/org.eclipse.cdt.doc.user/reference/cdt_u_mprop_macros.htm
+++ b/doc/org.eclipse.cdt.doc.user/reference/cdt_u_mprop_macros.htm
@@ -105,7 +105,10 @@ workspace.</p>
 <p class="MsoNormal">The value of a build macro will be searched 
 for in the order specified above.&nbsp;If macro is not found for the currently 
 selected file context, the currently selected option context will be used, if 
-not found, the currently selected configuration context will be used, etc.&nbsp; </p>
+not found, the currently selected configuration context will be used, etc.&nbsp;  
+It is possible, but not recommended, for a user-defined macro to override the 
+definition of an MBS pre-defined macro.  Overriding MBS pre-defined macros can 
+have unanticipated consequences.</p>
 <p class="MsoNormal">To define a new macro the &quot;New&quot; button should be pressed. 
 A dialog will appear representing the macro definition.</p>
 <p class="MsoNormal">
diff --git a/doc/org.eclipse.cdt.doc.user/topics_Concepts.xml b/doc/org.eclipse.cdt.doc.user/topics_Concepts.xml
index f0cda319008..46c58f7368c 100644
--- a/doc/org.eclipse.cdt.doc.user/topics_Concepts.xml
+++ b/doc/org.eclipse.cdt.doc.user/topics_Concepts.xml
@@ -23,7 +23,6 @@
 	</topic>
 	<topic label="Build" href="concepts/cdt_o_build_conc.htm"> 
 		<topic label="Building C/C++ Projects" href="concepts/cdt_c_build_over.htm"/> 
-		<topic label="Manage Build Extensibility Document" href="http://dev.eclipse.org/viewcvs/index.cgi/~checkout~/cdt-home/user/Reference%20Documents/Managed_Build_21/Managed_Build_Extensibility.html?cvsroot=Tools_Project"/>
 	</topic>
 	<topic label="Debug" href="concepts/cdt_o_dbg_concepts.htm">
 		<topic label="BreakPoints" href="concepts/cdt_c_brkpnts.htm"/>