It is important that you always have the latest Flash XML files installed. Adobe sometimes introduces features in dot releases (minor releases) of Flash Player. When such a release is available, you should update your version of Flash to get the latest XML files. Otherwise, the Flash compiler might generate errors if you use new properties or methods that were unavailable in the version of Flash Player that came with your Flash installation.

For example, Flash Player 7 (7.0.19.0) contained a new method for the System object, System.security.loadPolicyFile. To access this method, you must use the Player Updater installer to update all the Flash players that are installed with Flash. Otherwise, the Flash compiler displays errors.

Remember that you can install a Player Updater that is one or more major versions ahead of your version of Flash. By doing this, you will get the XML files that you need but shouldn't have any compiler errors when you publish to older versions of Flash Player. Sometimes new methods or properties are available to older versions, and having the latest XML files minimizes the compiler errors you get when you try to access older methods or properties.