Celeste is still far from being 100% compatible with iOS 5.1

  Celeste is a Cydia plugin that on iOS 4.3.x allows iDevice owners to send and receive almost any kind of files via Bluetooth. After the release of iOS 5.0, the plugin became incompatible with the new operating system and although more than 5 months have passed since then, Celeste is still far from being compatible with the latest version of iOS. For more than a month, the developers of the plugin have been working on improving compatibility with iOS 5, but we cannot talk about 5.1 for now.

  Those who bought Celeste when they had iOS 4 do not have a final and stable version of the plugin available, but maybe when the untethered jailbreak solution for iOS 5.1 is available you will have a final and usable version of Celeste.