

Earlier this week, Apple released version 1.1.1 of its iBooks application, bringing several enhancements including support for embedded audio and video.
The update clearly contained a bug, however, as Apple today released version 1.1.2 with an additional bullet point in its "What's New" section:
Apple has not disclosed any additional information on the exact issue addressed, but clearly anyone who may have had difficulty updating previously might want to try again with the newly-revised version.Addresses a minor issue when updating iBooks.
Article Link: 'iBooks' Bug Squashed With New Update