Bug 81292 [Preferences] Message area should be disabled when empty
200412152000 My GTK theme has a textured background by default. There is a section of the preference dialog next to the Default/Apply buttons that does not respect this. I suspect there is an empty label/text widget that has had its background colour set manually. Screencap forthcoming
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferencePage.java
break;
			case IMessageProvider.WARNING:
				newImage = JFaceResources.getImage(Dialog.DLG_IMG_MESSAGE_WARNING);
				break;
			case IMessageProvider.ERROR:
				newImage = JFaceResources.getImage(Dialog.DLG_IMG_MESSAGE_ERROR);
				showingError = true;
				break;
			}
			
			if(newMessage == null){
				hideRegion();
				return;
			}
			messageComposite.setVisible(true);
			
			if (newMessage.equals(messageText.getText())
					&& newImage == messageImageLabel.getImage())
				return;
			messageImageLabel.setImage(newImage);
			if (newMessage == null)
				messageText.setText("");
			else
				messageText.setText(newMessage);
			if (showingError)
				setMessageColors(JFaceColors.getErrorBackground(messageComposite.getDisplay()));
			else {
				lastMessageText = newMessage;
				setMessageColors(JFaceColors.getBannerBackground(messageComposite.getDisplay()));
			}