This morning, Apple has released iTunes 11.0.4 with a focus on bug fixes. Notably, according to the release notes, a bug that would force iTunes to quit when syncing moves between wired and wireless states has been fixed.
Additionally, a bug that forces users to repeatedly sign-in to the iTunes Store has also been squashed. The update is available via the Mac App Store’s Software Update function.
Last month, Apple updated iTunes with a new Mini-Player design and other improved music sorting and playback views. A bug fix release for Aperture for Mac has also been issued.