Although the basic interface unfortunately remains the same, Skype has released Skype 5.2. The latest release of the Internet telephony software introduces a new view that enables you to see and control video calls even when you switch away from the Skype app. Skype Premium subscribers can also share screens with a group, rather than just one-to-one. The company has also added support for the HD cameras that come built into newer Macs, as well as Logitech’s B910 HD camera. A number of unspecified bug fixes round up the release, although several known issues remain, including a crash when changing your password, problems starting screen sharing when the remote party does not send video, and no keyboard support for dialing when using Mac OS X 10.5 Leopard. Also, although Skype 5 features automatic updates, for at least one of us, the automatic update failed, forcing a manual download and install. (Free, 20.8 MB, release notes)
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-]).