Delicious Monster has released Delicious Library 3.1.6 with a number of bug fixes. The media cataloging app now ensures that duplicating items with custom covers doesn’t render the cover in low resolution, fixes an issue that prevented some collections from being exported to XML, addresses a crash that occurred when publishing collections without a defined type, provides a workaround in OS X 10.9 Mavericks for failed lookups that occurred due to a user’s region being set outside the United States, and improves Spotlight updating speeds. ($25 new from Delicious Monster and the Mac App Store, free update, 77.5 MB)
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-]).