In Plugin Class there is;

	/**
	 * Event handler: called when instantiating an Item for preview.
	 *
	 * @param array Associative array of parameters
	 *   - 'Item': the related Item (by reference)
	 */
	function AppendItemPreviewTransact()
	{
	}

The commenting says it has params but the function is missing the ( & $params ) .....

Any reason why?