I recently took a trip and got plenty of pictures from my iphone 4S. Some of them synced to the ipad with photostream, but not all of them. I'm not sure why this happened - but does anyone know how I can induce my ipad to pick these up? They are all connected to wifi and have been charged so I don't see why it's not doing it. I've also tried having the photos app open on both devices. It was working in one of the airports until I had to board a plane, and now 3 days later it still hasn't synced. Thanks.