Versions 1.1.1 and 1.0 work seemingly fine under 10.8 Mountain Lion. However since the application is no longer under active development by Bohemian Coding, the update link doesn't work. If you try to check for an update the application will display an error. If you cancel the update check, it will continue to check for an update. You have to close the application before using it, otherwise it will continue in the "cannot find update" loop.