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.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
return level;
			}
		}
		return -1;
	}
	/**
	 * Check if the given element is linked from a library or not.
	 * 
	 * @param handle
	 *            the handle of the element to check
	 * @return true if it is linked from a library ,or false if else;
	 * 
	 */
	public static boolean isLinked( DesignElementHandle handle )
	{
		if ( handle.getExtends( ) != null )
		{
			return handle.getExtends( ).getRoot( ) instanceof LibraryHandle;
		}
		return false;
	}
	/**
	 * Return the group list of the given element.
	 * 
	 * @param handle
	 *            the handle of the element.
	 * @return the group list of the given element.
	 */
	public static List getGroups( DesignElementHandle handle )
	{