diff --git a/apache-maven/src/assembly/maven/bin/mvnDebug b/apache-maven/src/assembly/maven/bin/mvnDebug
old mode 100644
new mode 100755
diff --git a/apache-maven/src/assembly/maven/bin/mvnyjp b/apache-maven/src/assembly/maven/bin/mvnyjp
old mode 100644
new mode 100755
diff --git a/maven-model-builder/src/main/java/org/apache/maven/model/interpolation/StringVisitorModelInterpolator.java b/maven-model-builder/src/main/java/org/apache/maven/model/interpolation/StringVisitorModelInterpolator.java
index 98e36f6cb4..313c4f7416 100644
--- a/maven-model-builder/src/main/java/org/apache/maven/model/interpolation/StringVisitorModelInterpolator.java
+++ b/maven-model-builder/src/main/java/org/apache/maven/model/interpolation/StringVisitorModelInterpolator.java
@@ -1420,7 +1420,7 @@ public class StringVisitorModelInterpolator
                     {
                         String value = (String) v;
                         String inter = interpolate( value );
-                        if ( value != inter )
+                        if ( value != inter && inter != null )
                         {
                             entry.setValue( inter );
                         }