Bug 171415 [Viewers] Table viewer needs to clear label, image when items are reused
If an item is reused for a different element on a refresh, the table viewer needs to clear the label and image from the item being reused. This is necessary to communicate to the label provider that a new label is needed (i.e. the label provider may defer providing a label if decorators are not ready). This is what the tree viewer does. To see the problem, open the Java Browsing perspective and select a Java project. Then click between different packages. Notice that some of the labels in the Types list take a while to update. Opening one of these reveals that the label is showing the wrong text.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTableViewer.java
* reflect the model. This method only affects the viewer, not the model.
	 * </p>
	 * 
	 * @param elements
	 *            the elements to remove
	 */
	public void remove(final Object[] elements) {
		assertElementsNotNull(elements);
		if (elements.length == 0) {
			return;
		}
		preservingSelection(new Runnable() {
			public void run() {
				internalRemove(elements);
			}
		});
	}
	/**
	 * Removes the given element from this table viewer. The selection is
	 * updated if necessary.
	 * <p>
	 * This method should be called (by the content provider) when a single
	 * element has been removed from the model, in order to cause the viewer to
	 * accurately reflect the model. This method only affects the viewer, not
	 * the model. Note that there is another method for efficiently processing
	 * the simultaneous removal of multiple elements.
	 * </p>
	 * <strong>NOTE:</strong> removing an object from a virtual table will
	 * decrement the itemCount.
	 *