After upgrading to Android 2.3.4, the phone has a new feature to take screen shots when pressing Power and Home together. This is intended to be part of the update. See: Screen shot take / capture.
Sometimes after the update, the device may take screen shots when you press only the Power button or only the Home key. If you think it is taking them by accident, follow the steps below.
Verify that you have the most recent software version. See Software update: HTC Sensation 4G
Making the Home key work
If you are taking screen shots by accident, follow these steps:
Troubleshooting when this happens frequently
If your phone frequently takes screen shots by accident (not just occasionally), follow these steps:
Are you sure you want to delete this document?