Apple has postponed the announced date when all Mac App Store applications must be sandboxed, from November 2011 to March 2012. Maybe that's because sandboxing isn't working either for Apple or for developers. Developer Wil Shipley ruminates on why requiring application sandboxing is the wrong strategy for Apple. follow link
Dragging between Spaces
Juggling various applications within multiple Spaces? If you drag an application window to the edge of your screen and pause for a moment, Mac OS X will move the window into the space that lives in that direction.
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Sandbox or Catbox?