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Lesson 6. Application Environments > What You've Learned - Pg. 109

Application Environments 109 New in Mac OS X 10.4 is the Safe Launch feature. If an application crashes, a dialog may appear giving you the option of reopening the application. Because the application preferences might have been corrupted by the crash, or could have been the cause of the crash, on the next launch you will have the option of opening that application using a new, blank preferences file. This returns many or all settings to their defaults, so your application may behave differently when it's opened with the new preferences file. Mac OS X saves the old preferences by appending .saved to the file name, so you can always restore your old preferences manually if need be. If the application successfully launches with the new preferences, the problem was probably caused by a corrupt preferences file. When you quit the application on that launch, you'll see a dialog asking if you want to keep the new settings. In most cases, you will want to keep the new settings. Not all applications support Safe Launch. If the Safe Launch dialogs don't appear when an appli- cation crashes, you can manually force that application to create a new preferences file. In the