The Corona jailbreak was updated recently, but don’t get your hopes up yet. The new version 1.0-4 still only supports iPhone 4/3GS iPod Touch 4G/3G and iPad 1. The update fixes iBooks along with the launchd framework. If you used Redsn0w to jailbreak from a clean firmware earlier then downloading Corona will fix iBooks and launchd. If you used Corona previously to untether then all you will have to do is update the package.
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