C:\dev\maven\src\maven-2.0.x\maven-project>c:\cygwin\bin\svn diff  
Index: src/main/resources/org/apache/maven/project/pom-4.0.0.xml
===================================================================
--- src/main/resources/org/apache/maven/project/pom-4.0.0.xml	(revision 378159)
+++ src/main/resources/org/apache/maven/project/pom-4.0.0.xml	(working copy)
@@ -67,6 +67,7 @@
       <activation>
         <property>
           <name>performRelease</name>
+          <value>true</value>
         </property>
       </activation>