Apple has just released the second beta of iOS 5.1 to developers, and while we don't know yet if it will fix lingering battery issues the company failed to quash with 5.01, there's at least once new welcome feature here: If you're an iCloud user, you'll soon be able to delete individual photos from your Photo Stream. When reviewing the iPhone 4S, we were disappointed that Photo Stream was an "all or nothing" affair — if a photo was added to Photo Stream, there was no way to remove it unless you completely disabled the service — but it looks like Apple is reversing course. So if you prefer to carefully curate your Photo Stream rather than just let any old image you snap on your phone to be included, this is an update to look forward to. As for the battery life issue, we'll keep an eye out for any developers reporting on improvements.