Bug 146159 [Regression]Changing font operation doesn't work other than the first time
Description: The first time changing operation can work well. However, Change it again, it won't work. Steps: 1.Insert lable/text to layout or master page 2.Change the font from serif to cursive, it works well 3.Change the font again Result: The action doesn't work Additional infor: build number:200606080632
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/util/UIUtil.java
* @param pluginId
	 *            the identify of the plugin
	 * 
	 * @return the plug-in name, or null if the plug-in is not found
	 */
	public static String getPluginName( String pluginId )
	{
		return getBundleValue( pluginId,
				org.osgi.framework.Constants.BUNDLE_NAME );
	}
	/**
	 * Returns the plug-in version
	 * 
	 * @param pluginId
	 *            the identify of the plugin
	 * 
	 * @return the plug-in version, or null if the plug-in is not found
	 */
	public static String getPluginVersion( String pluginId )
	{
		return getBundleValue( pluginId,
				org.osgi.framework.Constants.BUNDLE_VERSION );
	}
	private static String getBundleValue( String pluginId, String key )
	{
		Assert.isNotNull( pluginId );
		Bundle bundle = Platform.getBundle( pluginId );
		if ( bundle != null )
		{
			return (String) bundle.getHeaders( ).get( key );