1. Create Mobile Hybrid Project
2. Add Accelerometer testing page as described on phonegap wep page
3. Run Project on CordovaSim and/or Emulator and/or Android device
4. Open Acceleromer page
ASSERT: App is displaying data from Accelerometer
5. Open index.html page add some widget from jQuery Mobile pallete and save
6. Repeat step 3. and 4.
ERROR: App is not displaying data from Accelerometer. Event DeviceReady is not fired

When adding widget from jQuery Mobile pallete also this reference to jQuery Mobile java script file is added

<script src="http://code.jquery.com/mobile/1.3.1/jquery.mobile-1.3.1.min.js"></script>

and it seems is somehow breaking Cordova API functionality. Once removed from index.html application is displaying data from Acceleromer again