Gulf Air's order for 20 A330-300s, placed in July 2008, is increasing looking doubtful. Delivery slots for A330s ordered in early 2008 were available as early as 2011. One would expect aircraft from this order to have been delivered by now, but as of September 2012, none have been built or delivered.
In June 2010, Airbus' order report showed a cancellation for four A330-300s but did not disclose the customer. In September 2012, another 10 A330-300s were cancelled, but again, Airbus did not disclose the customer. An analysis of Aviation Week Intelligence Network's Fleet database shows that Gulf Air is very likely to be this undisclosed customer as nearly all other A330-300 customers have been taking delivery of their aircraft, especially those who placed orders around 2008 and before. Gulf Air's A330-300 order is the only one that appears "stale".
Gulf Air also placed an order for a total of 24 787-8s in 2008 and 2009, but eight of these have already been cancelled.