Bug 56637 [Preferences] DialogMessageArea image is too large
Is the background color of the error shown by DialogMessageArea to be changed? Or do you intend to leave it as it is right now? The error message looks a little out of place in the current implementation (being surrounded by white space).
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceDialog.java
* Create the layout data for the message area.
	 * @return FormData for the message area.
	 */
	private FormData createMessageAreaData() {
		FormData messageData = new FormData();
		messageData.top = new FormAttachment(0);
	    messageData.bottom = new FormAttachment(titleImage,0,SWT.BOTTOM);
		messageData.right = new FormAttachment(titleImage,0);
		messageData.left = new FormAttachment(0);
		return messageData;
	}
	/**
	 * @param parent the SWT parent for the tree area controls.
	 * @return the new <code>Control</code>.
	 * @since 3.0
	 */
	protected Control createTreeAreaContents(Composite parent) {
		
		treeViewer = createTreeViewer(parent);
		treeViewer.setInput(getPreferenceManager());
		layoutTreeAreaControl(treeViewer.getControl());
		return treeViewer.getControl();
	}
	/**
	 * Create a new <code>TreeViewer</code>.
	 * @param parent the parent <code>Composite</code>.
	 * @return the <code>TreeViewer</code>.
	 * @since 3.0
	 */
	protected TreeViewer createTreeViewer(Composite parent) {