diff --git a/changelog/project.xml b/changelog/project.xml
index 06f5a13f..43190435 100644
--- a/changelog/project.xml
+++ b/changelog/project.xml
@@ -219,11 +219,19 @@
       <groupId>xerces</groupId>
       <artifactId>xercesImpl</artifactId>
       <version>2.6.2</version>
+      <url>http://xerces.apache.org/xerces2-j/</url>
+      <properties>
+        <comment>This library is already loaded by maven's core. Be careful to use the same version number as in the core.</comment>
+      </properties>
     </dependency>
     <dependency>
       <groupId>xerces</groupId>
       <artifactId>xmlParserAPIs</artifactId>
       <version>2.6.2</version>
+      <url>http://xerces.apache.org/xerces2-j/</url>
+      <properties>
+        <comment>This library is already loaded by maven's core. Be careful to use the same version number as in the core.</comment>
+      </properties>
     </dependency>
   </dependencies>
 </project>
diff --git a/changes/project.xml b/changes/project.xml
index def85d40..c6f64e12 100644
--- a/changes/project.xml
+++ b/changes/project.xml
@@ -112,6 +112,9 @@
       <artifactId>xmlParserAPIs</artifactId>
       <version>2.6.2</version>
       <url>http://xerces.apache.org/xerces2-j/</url>
+      <properties>
+        <comment>This library is already loaded by maven's core. Be careful to use the same version number as in the core.</comment>
+      </properties>
     </dependency>
   </dependencies>
 </project>
diff --git a/dashboard/src/plugin-test/testIndividualReportsNotGeneratedByDashboard/project.xml b/dashboard/src/plugin-test/testIndividualReportsNotGeneratedByDashboard/project.xml
index 6894a871..a6d0b4c7 100644
--- a/dashboard/src/plugin-test/testIndividualReportsNotGeneratedByDashboard/project.xml
+++ b/dashboard/src/plugin-test/testIndividualReportsNotGeneratedByDashboard/project.xml
@@ -25,11 +25,13 @@
       <groupId>xerces</groupId>
       <artifactId>xercesImpl</artifactId>
       <version>2.6.2</version>
+      <url>http://xerces.apache.org/xerces2-j/</url>
     </dependency>
     <dependency>
       <groupId>xerces</groupId>
       <artifactId>xmlParserAPIs</artifactId>
       <version>2.6.2</version>
+      <url>http://xerces.apache.org/xerces2-j/</url>
     </dependency>
   </dependencies>
   <reports>
diff --git a/html2xdoc/project.xml b/html2xdoc/project.xml
index fe8a94b1..7a1bd786 100644
--- a/html2xdoc/project.xml
+++ b/html2xdoc/project.xml
@@ -101,12 +101,18 @@
       <artifactId>xmlParserAPIs</artifactId>
       <version>2.6.2</version>
       <url>http://xerces.apache.org/xerces2-j/</url>
+      <properties>
+        <comment>This library is already loaded by maven's core. Be careful to use the same version number as in the core.</comment>
+      </properties>
     </dependency>
     <dependency>
       <groupId>xerces</groupId>
       <artifactId>xercesImpl</artifactId>
       <version>2.6.2</version>
       <url>http://xerces.apache.org/xerces2-j/</url>
+      <properties>
+        <comment>This library is already loaded by maven's core. Be careful to use the same version number as in the core.</comment>
+      </properties>
     </dependency>
   </dependencies>
 </project>
diff --git a/jalopy/project.xml b/jalopy/project.xml
index 728047e9..7fcae8dd 100644
--- a/jalopy/project.xml
+++ b/jalopy/project.xml
@@ -109,6 +109,9 @@
       <artifactId>xmlParserAPIs</artifactId>
       <version>2.6.2</version>
       <url>http://xerces.apache.org/xerces2-j/</url>
+      <properties>
+        <comment>This library is already loaded by maven's core. Be careful to use the same version number as in the core.</comment>
+      </properties>
     </dependency>
     <dependency>
       <groupId>jdom</groupId>
diff --git a/jdepend/project.xml b/jdepend/project.xml
index 991bb787..6902ffe0 100644
--- a/jdepend/project.xml
+++ b/jdepend/project.xml
@@ -124,12 +124,18 @@
       <artifactId>xmlParserAPIs</artifactId>
       <version>2.6.2</version>
       <url>http://xerces.apache.org/xerces2-j/</url>
+      <properties>
+        <comment>This library is already loaded by maven's core. Be careful to use the same version number as in the core.</comment>
+      </properties>
     </dependency>
     <dependency>
       <groupId>xerces</groupId>
       <artifactId>xercesImpl</artifactId>
       <version>2.6.2</version>
       <url>http://xerces.apache.org/xerces2-j/</url>
+      <properties>
+        <comment>This library is already loaded by maven's core. Be careful to use the same version number as in the core.</comment>
+      </properties>
     </dependency>
   </dependencies>
 </project>
diff --git a/jdiff/project.xml b/jdiff/project.xml
index f5d45f59..839ac477 100644
--- a/jdiff/project.xml
+++ b/jdiff/project.xml
@@ -81,6 +81,9 @@
       <artifactId>xercesImpl</artifactId>
       <version>2.6.2</version>
       <url>http://xerces.apache.org/xerces2-j/</url>
+      <properties>
+        <comment>This library is already loaded by maven's core. Be careful to use the same version number as in the core.</comment>
+      </properties>
     </dependency>
   </dependencies>
 </project>
diff --git a/jellydoc/project.xml b/jellydoc/project.xml
index 89f746d2..c3bf4970 100644
--- a/jellydoc/project.xml
+++ b/jellydoc/project.xml
@@ -89,12 +89,18 @@
       <artifactId>xmlParserAPIs</artifactId>
       <version>2.6.2</version>
       <url>http://xerces.apache.org/xerces2-j/</url>
+      <properties>
+        <comment>This library is already loaded by maven's core. Be careful to use the same version number as in the core.</comment>
+      </properties>
     </dependency>
     <dependency>
       <groupId>xerces</groupId>
       <artifactId>xercesImpl</artifactId>
       <version>2.6.2</version>
       <url>http://xerces.apache.org/xerces2-j/</url>
+      <properties>
+        <comment>This library is already loaded by maven's core. Be careful to use the same version number as in the core.</comment>
+      </properties>
     </dependency>
   </dependencies>
   <versions>
diff --git a/pdf/project.xml b/pdf/project.xml
index d2b7041c..b78e9a46 100644
--- a/pdf/project.xml
+++ b/pdf/project.xml
@@ -132,12 +132,18 @@
       <artifactId>xmlParserAPIs</artifactId>
       <version>2.6.2</version>
       <url>http://xerces.apache.org/xerces2-j/</url>
+      <properties>
+        <comment>This library is already loaded by maven's core. Be careful to use the same version number as in the core.</comment>
+      </properties>
     </dependency>
     <dependency>
       <groupId>xerces</groupId>
       <artifactId>xercesImpl</artifactId>
       <version>2.6.2</version>
       <url>http://xerces.apache.org/xerces2-j/</url>
+      <properties>
+        <comment>This library is already loaded by maven's core. Be careful to use the same version number as in the core.</comment>
+      </properties>
     </dependency>
     <dependency>
       <groupId>xalan</groupId>
diff --git a/plugin/project.xml b/plugin/project.xml
index 51d35346..8161d3ec 100644
--- a/plugin/project.xml
+++ b/plugin/project.xml
@@ -174,12 +174,18 @@
       <artifactId>xmlParserAPIs</artifactId>
       <version>2.6.2</version>
       <url>http://xerces.apache.org/xerces2-j/</url>
+      <properties>
+        <comment>This library is already loaded by maven's core. Be careful to use the same version number as in the core.</comment>
+      </properties>
     </dependency>
     <dependency>
       <groupId>xerces</groupId>
       <artifactId>xercesImpl</artifactId>
       <version>2.6.2</version>
       <url>http://xerces.apache.org/xerces2-j/</url>
+      <properties>
+        <comment>This library is already loaded by maven's core. Be careful to use the same version number as in the core.</comment>
+      </properties>
     </dependency>
     <dependency>
       <groupId>msv</groupId>
diff --git a/plugins-parent/project.properties b/plugins-parent/project.properties
index 46c23be6..bf859656 100644
--- a/plugins-parent/project.properties
+++ b/plugins-parent/project.properties
@@ -79,6 +79,8 @@ maven.jar.plexus-utils=1.0.3
 maven.jar.wagon-file=1.0-alpha-4
 maven.jar.wagon-http=1.0-alpha-3
 maven.jar.wagon-provider-api=1.0-alpha-3
+maven.jar.xercesImpl=2.6.2
+maven.jar.xmlParserAPIs=2.6.2
 
 maven.jar.maven = ${maven.home}/lib/maven.jar
 
diff --git a/test/project.xml b/test/project.xml
index bee13688..9a41e23a 100644
--- a/test/project.xml
+++ b/test/project.xml
@@ -66,12 +66,18 @@
       <artifactId>xmlParserAPIs</artifactId>
       <version>2.6.2</version>
       <url>http://xerces.apache.org/xerces2-j/</url>
+      <properties>
+        <comment>This library is already loaded by maven's core. Be careful to use the same version number as in the core.</comment>
+      </properties>
     </dependency>
     <dependency>
       <groupId>xerces</groupId>
       <artifactId>xercesImpl</artifactId>
       <version>2.6.2</version>
       <url>http://xerces.apache.org/xerces2-j/</url>
+      <properties>
+        <comment>This library is already loaded by maven's core. Be careful to use the same version number as in the core.</comment>
+      </properties>
     </dependency>
   </dependencies>
 </project>
diff --git a/xdoc/project.xml b/xdoc/project.xml
index d8e8ee94..904215af 100644
--- a/xdoc/project.xml
+++ b/xdoc/project.xml
@@ -254,6 +254,9 @@
       <artifactId>xmlParserAPIs</artifactId>
       <version>2.6.2</version>
       <url>http://xerces.apache.org/xerces2-j/</url>
+      <properties>
+        <comment>This library is already loaded by maven's core. Be careful to use the same version number as in the core.</comment>
+      </properties>
     </dependency>
     <dependency>
       <groupId>commons-jelly</groupId>