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
/**
	 * Creates the inner page container.
	 */
	private Composite createPageContainer(Composite parent) {
		Composite result = new Composite(parent, SWT.NULL);
		result.setLayout(new PageLayout());
		return result;
	}
	/**
	 * Creates the wizard's title area.
	 *
	 * @param parent the SWT parent for the title area composite.
	 * @return the created title area composite.
	 */
	private Composite createTitleArea(Composite parent) {
		
		
		
		int margins = 2;
		titleArea = new Composite(parent, SWT.NONE);
		
		FormLayout layout = new FormLayout();
		layout.marginHeight = margins;
		layout.marginWidth = margins;
		titleArea.setLayout(layout);
		
		Display display = parent.getDisplay();
		Color background = JFaceColors.getBannerBackground(display);
		
		GridData layoutData = new GridData(GridData.FILL_HORIZONTAL);