Problems with Froyo creates chaos in Android Market

Froyo may be a tasty treat for Android users, but it might leave a little bad after-taste right now. According to some reports, phones upgraded to Android 2.2 are not displaying certain applications in the Android Market. It seems that some apps that the developer enabled copy protection on are the ones that are missing while using Froyo. The developer has the option of "Forward Locking" his work to prevent unauthorized copying of the app or the installation on unauthorized phones. Because Android 2.2 has not officially been released, it gives off a signature as through it was coming from an unauthorized phone. Those who installed an app that is not showing up can still run the application, but it will not appear on the Downloads section of the Market. If you had to put your phone through a factory update, you will have to repurchase previously bought apps because there is no proof that you previously paid for them. Some of the apps involved are The New York Times, FlightTrack and Calorie Counter. Once Froyo becomes an official release, or if Google eliminates "Forward Locking" as a developer option, the disappearing apps should reappear.

source: AndroidandMe