Quarantining files has its benefits, but a current bug is causing some trouble.
When you first download a file in OS X the system considers it to be foreign and tags it with a quarantine flag. This flag prevents it from running if it contains executable code, at least until it is scanned and the user is notified that the file contains code and could potentially change files on the computer. If the file is an application, then when you open it the launch services will present a warning that the file was downloaded from the Internet. Once you confirm … Read more