Bug 61313 Platform native icons not used in dialogs
N20040506 For example the 'info' icon for operations in progress, the 'error' icon when an exception occurs, and the 'question' icon when asked to confirm a resource deletion. These used to use the native icons on Windows XP but now they look quite different and non-native. This is a fairly recent regression.
bundles/org.eclipse.jface/src/org/eclipse/jface/resource/ImageRegistry.java
return;
		Entry entry = (Entry) getTable().remove(key);
		if (entry != null) {
		    if (entry.image != null && !entry.image.isDisposed()) {
		        entry.image.dispose();
		    }
		    entry.image = null;
		}
	}
	/**
	 * Contains the data for an entry in the registry. 
	 */
	private static class Entry {
		protected Image image;
		protected ImageDescriptor descriptor;
	}
	private Entry getEntry(String key) {
		return (Entry) getTable().get(key);
	}
	private void putEntry(String key, Entry entry) {
		getTable().put(key, entry);
	}
	private Map getTable() {
		if (table == null) {
			table = new HashMap(10);
		}
		return table;
	}
}