Apple iOS 5.1.1 fixes a number of annoying bugs - Forbes | mrpbps iDevices |

"Apple has released iOS 5.1.1 for the iPhone, iPad and iPod touch. This update brings with is a number of much-needed bug fixes.
If you choose to download the update direct from your iDevice (Settings > General > Software Update) then the download is under 50MB, as opposed to several hundred if you download it via iTunes."