Apple has just released iOS 5.1.1 (build number 9B206) for iPad, iPod touch, and iPhone. The download is 54.4 MB and includes: Improved reliability of using HDR option for photos taken using the Lock Screen shortcut, Addresses bugs that could prevent the new iPad from switching between 2G and 3G networks, Fixes bugs that affected AirPlay video playback in some circumstances, Improved reliability for syncing Safari bookmarks and Reading List and Fixes an issue where ‘Unable to purchase’ alert could be displayed after successful purchase.