Bug 50340 [Contributions] Large toolbar buttons under Windows XP
200401201132 - enable SWT to use Windows XP widgets (provide java.exe.manifest file; for details see SWT mailing list) - observe: the toolbar buttons are really large !! See attached screen shot
bundles/org.eclipse.jface/src/org/eclipse/jface/action/ActionContributionItem.java
private Widget widget = null;
	/**
	 * Creates a new contribution item from the given action.
	 * The id of the action is used as the id of the item.
	 *
	 * @param action the action
	 */
	public ActionContributionItem(IAction action) {
		super(action.getId());
		this.action = action;
	}
	/**
	 * Handles a property change event on the action (forwarded by nested listener).
	 */
	private void actionPropertyChange(final PropertyChangeEvent e) {
		
		if (isVisible() && widget != null) {
			Display display = widget.getDisplay();
			if (display.getThread() == Thread.currentThread()) {
				update(e.getProperty());
			} else {
				display.asyncExec(new Runnable() {
					public void run() {
						update(e.getProperty());
					}
				});
			}
		}
	}
	/**