In conjunction with the announcement of the iPhone 5 and new iPod models, Apple has released iTunes 10.7 to add support for iPhone, iPad, and iPod touch models running iOS 6 (scheduled for release on 19 September 2012). Additionally, it adds support for the latest iPod nano and iPod shuffle models. With no new features, iTunes 10.7 is just a compatibility stopgap until the next major release of iTunes appears in October. (Free, 157.33 MB via direct download or 163.3 MB via Software Update)
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Use Shift to Compare Edits in iPhoto '08
In iPhoto '08, while you're editing a photo, press the Shift key to see a "before" view; let it up to see the "after" view. It's much faster and easier than using Undo and Redo.