Bug 93245 [Dialogs] Error messages show up in two locations in the properties dialog
Force an error message: 1) select a Java project 2) open the properties dialog 3) navigate to Java Compiler>Building 4) enable project specific settings 5) enter a letter into the maximum number of problems field ->the error message shows up at the bottom 6) resize the dialog ->the error message also shows up in the banner
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceDialog.java
titleImage = new Label(titleArea, SWT.LEFT);
		titleImage.setBackground(background);
		titleImage.setImage(JFaceResources.getImage(PREF_DLG_TITLE_IMG));
		FormData imageData = new FormData();
		imageData.right = new FormAttachment(100);
		imageData.top = new FormAttachment(0);
		imageData.bottom = new FormAttachment(100);
		titleImage.setLayoutData(imageData);
		messageArea.setTitleLayoutData(createMessageAreaData());
		messageArea.setMessageLayoutData(createMessageAreaData());
		return titleArea;
	}
	/**
	 * 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