When I set my tablet into the cradle, an application automatically opens

When you set your tablet device in the cradle for the first time, you will be prompted to select which application you want to start when using the cradle. If you check [Use by default for this action] and select an application, the selected application will start the next time you set your tablet device in the cradle.

To return to the default setting, tap [ Apps] - [ Settings] - [ Applications] - [Manage applications]
- (the application that is selected to start automatically). On the displayed application management screen, tap [Clear defaults]. The setting will be cleared.