Index: src/test/java/org/apache/maven/plugin/war/WarManifestMojoTest.java
===================================================================
--- src/test/java/org/apache/maven/plugin/war/WarManifestMojoTest.java	(revision 784221)
+++ src/test/java/org/apache/maven/plugin/war/WarManifestMojoTest.java	(working copy)
@@ -139,8 +139,44 @@
         assertTrue( idx >= 0 );
 
         idx = content.indexOf( "Implementation-Vendor" );
+
+        assertTrue( idx >= 0 );  
     }
 
+
+    public void testManifestWithCustomAttributes()
+      throws Exception
+    {
+        loadMojo( "target/test-classes/unit/manifest/manifest-with-custom-attrs/plugin-config.xml" );
+
+        MavenArchiveConfiguration config = (MavenArchiveConfiguration) getVariableValueFromObject( mojo, "archive" );
+
+        mojo.execute();
+
+        assertTrue( config.getManifest().isAddExtensions() );
+
+        File warSourceDir = (File) getVariableValueFromObject( mojo, "warSourceDirectory" );
+
+        File manifestDir = new File( warSourceDir, "META-INF" );
+
+        File manifest = new File( manifestDir, "MANIFEST.MF" );
+
+        assertTrue( manifest.exists() );
+
+        String content = FileUtils.fileRead( manifest );
+
+        int idx = content.indexOf( "Specification-Title" );
+
+        assertTrue( idx >= 0 );
+        
+        idx = content.indexOf( "Custom-Version" );
+
+        assertTrue( idx >= 0);
+
+
+    }
+
+
     public void loadMojo( String pluginXml )
         throws Exception
     {
@@ -150,4 +186,5 @@
 
         assertNotNull( mojo );
     }
+
 }
Index: src/main/java/org/apache/maven/plugin/war/WarManifestMojo.java
===================================================================
--- src/main/java/org/apache/maven/plugin/war/WarManifestMojo.java	(revision 784221)
+++ src/main/java/org/apache/maven/plugin/war/WarManifestMojo.java	(working copy)
@@ -74,7 +74,7 @@
         PrintWriter printWriter = null;
         try
         {
-            Manifest mf = ma.getManifest( getProject(), getArchive().getManifest() );
+            Manifest mf = ma.getManifest( getProject(), getArchive() );
             printWriter = new PrintWriter( WriterFactory.newWriter( manifestFile, WriterFactory.UTF_8 ) );
             mf.write( printWriter );
         }