Bug 287103 [CommonNavigator] contentServiceLabelProvider doesn't properly implement overrides
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/extensions/NavigatorContentDescriptorManager.java
imageRegistry = new ImageRegistry();
		}
		return imageRegistry;
	}
	private class NavigatorContentDescriptorRegistry extends
			NavigatorContentRegistryReader {
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.ui.internal.navigator.extensions.RegistryReader#readRegistry()
		 */
		public void readRegistry() {
			super.readRegistry();
			computeOverrides();
		}
		protected boolean readElement(IConfigurationElement anElement) {
			if (TAG_NAVIGATOR_CONTENT.equals(anElement.getName())) {
				try {
					addNavigatorContentDescriptor(new NavigatorContentDescriptor(
							anElement));
				} catch (WorkbenchException e) {
					
					NavigatorPlugin.log(e.getStatus());
				}
			}
			return super.readElement(anElement);
		}
	}
}