Fix (patch stream) for Bug 253977 - [Help] For Eclipse 3.4.2 fix regression caused by fix for Bug 237326 - [Help][Context] F1 accessibility - no indication that help view has opened (since there is no focus change)
diff --git a/bundles/org.eclipse.ui.views/src/org/eclipse/ui/views/properties/PropertySheet.java b/bundles/org.eclipse.ui.views/src/org/eclipse/ui/views/properties/PropertySheet.java
index ae5e28f..7cdd6b9 100644
--- a/bundles/org.eclipse.ui.views/src/org/eclipse/ui/views/properties/PropertySheet.java
+++ b/bundles/org.eclipse.ui.views/src/org/eclipse/ui/views/properties/PropertySheet.java
@@ -167,7 +167,9 @@
      * The property sheet may show properties for any view other than this view.
      */
     protected boolean isImportant(IWorkbenchPart part) {
-        return part != this;
+    	// Hack! See Bug 253977...explicitly exclude the Help view as a participant
+    	boolean isHelpView = "org.eclipse.help.ui.HelpView".equals(part.getSite().getId()); //$NON-NLS-1$
+        return part != this && !isHelpView;
     }
 
     /**