I create an app that supports both phone and tablet version so i use the android-support-v4.jar library. My activity extends the FragmentActivity and override the onCreateOp
You should consider from your Fragment code:
Fragment
1) Implementing onCreateOptionsMenu(Menu menu, MenuInflater inflater)
onCreateOptionsMenu(Menu menu, MenuInflater inflater)
2) Calling setHasOptionsMenu
setHasOptionsMenu
3) And also implementing onOptionsItemSelected(MenuItem item)
onOptionsItemSelected(MenuItem item)
Then you will be ok on both the phone and tablet.