Apple has released AirPort Utility 6.3.1 for Mac, which tackles a lone problem where some AirPort base stations failed to appear in AirPort Utility. It’s available via the Mac App Store, Software Update, and Apple’s support site. Additionally, version 1.3.1 of Airport Utility for iOS has also been released to tackle the same issue. (Free, 21.4 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.