Apple has released iTunes 11.3.1 with a couple of podcast-related fixes. The update squashes a bug that prevented subscribed podcasts from updating with new episodes and rectifies an issue that caused iTunes to become unresponsive while browsing podcast episodes in List view. iTunes 11.3.1 is available as a direct download from Apple’s iTunes Web page or via Software Update. (Free, 229 MB, 10.6.8+)
Go Back and Forth Fast in Preview
If you're reading a PDF in Apple's Preview software, and you follow a bookmark or an internal link to move around within the PDF, you can quickly return to where you were by pressing the keyboard shortcut Command-[ (that's Command-Left Bracket). Or, you can choose Go > Back.
The command works iteratively, so you can go back to just the previously viewed page or if you issue the command again, to the page before that, and so on. There's also an equivalent Go > Forward (Command-]).
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