Stairways Software has released a minor maintenance and stability update to the popular macro utility Keyboard Maestro. Version 4.0.1 resolves an issue that caused slow typing speeds when simulating keystrokes, fixes a bug that enabled multiple engines to run at once, prevents simulating keys from causing hot keys to trigger, and addresses a crashing bug that affected users running Mac OS X 10.5. Also, support for Growling macro execution has been added, the Remap Forward Delete macro is now disabled by default, and a 10-second emergency timeout has been added on trigger repeat. ($36 new, $18 upgrade from 3.x, free update, 7.6 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-]).