Adobe has released Lightroom 4.3 with support for 20 cameras and 42 lens profiles (including the iPhone 5) and fixes for a variety of bugs. Amongst the highlights, the professional photo cataloging and editing application fixes a problem with uploading to Flickr if the photo’s filename contained an apostrophe, ensures that Catalogs from Photoshop Elements 11 are updated, properly imports AVCHD video, fixes an issue where TIFF images could experience a tonal shift, and fixes a flickering problem with videos created on the iPhone 4. Additionally, Lightroom 4.3 now supports Retina displays when using either the Library or Develop modules. ($149 new, free update, 419 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.