Rogue Amoeba has updated its Airfoil network audio streaming app for the Mac to version 4.7.3, which now offers full support for receiving audio through Airfoil Speakers from devices running iOS 6. The Instant On component receives an update to version 6.0.2 to fix several unspecified issues, and the Airfoil Video Player has been fixed to avoid a crash on OS X 10.8.2. Additionally, audio can be captured from the WebKit application on Mountain Lion and Airfoil has been given an improved update process with automatic downloads and installation on quitting the app (via a newer version of Sparkle). ($25 new with a 15-percent discount for TidBITS members, free update, 9.1 MB, release notes)
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.