Apple has released Aperture 3.2.4, which promises improved stability for the professional photo organizer and editor when running on Mac OS X 10.6 Snow Leopard. The only other item noted for this maintenance release is a fix for an issue that prevented the Viewer from updating correctly after editing a photo using an external editor. ($79.99 new in the Mac App Store, free update, 635.54 MB)
Turn Off Filename Extension Warning
In Leopard, Apple fixed an annoying aspect of working with the Finder in Tiger. Previously, if you changed a file's extension, the Finder prompted for confirmation. But since no one has ever accidentally changed a filename extension, Apple thankfully added an option to turn that warning off in the Leopard Finder's preferences. Choose Finder > Preferences, and in the Advanced screen, deselect Show Warning Before Changing an Extension.