St. Clair Software has released Default Folder X 4.6.6, reassigning the Command-D shortcut to jump to the Desktop rather than invoke the Duplicate command. The Open and Save dialog enhancement utility now enables you to use its Rebound feature (to quickly return to recently used folders) in column view, fixes a bug that caused some apps (like Monosnap) to save files with the wrong file names, and disables audio previews by default to avoid triggering OS X to switch to the high performance graphics processor on some Macs. ($34.95 new, $10 off for TidBITS members, free update, 10.7 MB, release notes, 10.6+)
Keyboard-based Dock Navigation
If you're a fan of keyboard shortcuts and navigation, you may want try accessing the Dock from your keyboard. Press Control-F3 to enter the Dock's keyboard access mode. Then you can press a letter corresponding with an item's name to select it; press Return to open it, Command-Q to quit the selected application, or Escape to exit keyboard access mode. You can also use the arrow keys, Tab key, and other keyboard navigation keys to toggle between the Dock items.
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Default Folder X 4.6.6
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By reverting command+D to "Desktop," I can once again use my Mac intuitively, quickly, and nicely, returning DefaultFolder X to my most indispensable utility for the Mac.