Bug 87089 [Viewers] LabelProvider.getImage is not invoked after the TreeViewer changes introduced on 24/01/2005
If you compare the versions 1.26 and 1.25 of the method doUpdateItem(Item item, Object element) in org.eclipse.jface.viewers.TreeViewer, you will notice a change in the way the image of the element is calculated. In 1.25, the image of the Element is set in the "buildLabel" method which doesn't have a special treatment for ITableLabelProvider. In 1.26, if the label provider is a ITableLabelProvider, instead of calling ILabelProvider.getImage(Object), the code always invokes ITableLabelProvider.getColunmImage(Object). This change has broken the icons on one of the EMF generated editors (the mapping editor) as the images I will attach here demostrate.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/TreeViewer.java
* Set the fonts and colors for the treeItem if there is a color
		 * and font provider available.
		 * @param treeItem The item to update.
		 * @param element The element being represented
		 * @param column The column index
		 */
		public void setFontsAndColors(TreeItem treeItem, Object element, int column){
			if (colorProvider != null) {
				treeItem.setBackground(column, colorProvider.getBackground(element,
						column));
				treeItem.setForeground(column, colorProvider.getForeground(element,
						column));
			}
			if(fontProvider != null)
				treeItem.setFont(column,fontProvider.getFont(element,column));
		}	
		
	}
	
	/**
	 * Internal tree viewer implementation.
	 */
	private TreeEditorImpl treeViewerImpl;
	
    /**
     * This viewer's control.
     */
    private Tree tree;
    /**
	 * This viewer's tree editor.