There's nothing like real-world usage to flush out the last few bugs, as evidenced by the quick update to Keyboard Maestro 4.3.1, which fixes potential crashes when executing AppleScript or shell scripts, and when using device triggers. A few other minor bugs have also been fixed, and Stairways Software also added support for naming more X-Key keyboard keys and improved handling of negative numbers in the Move Window action. Full release notes are available. ($36 new, free update, 9.1 MB)
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Expose Shortcut for Arrange All Windows
In Expose in Snow Leopard, with all windows visible, press F9 (or the Expose key [F3] on recent Mac laptops), then press Command-1 to arrange the windows by name or press Command-2 to arrange them by application.