Delay with Android NavigationDrawer

Delay with Android NavigationDrawer

I've followed Google's recommended implementation of the Navigation Drawer
and now have an introductory Fragment and Map fragment that I transition
between. The drawer worked smoothly until I added ActionBarSherlock to my
project. Now, when the home (original fragment) is selected the menu is
delayed closing and I get an annoying flash before the home fragment
appears.
The fragment transaction is handled by:
FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction .setCustomAnimations(android.R.anim.fade_in,
android.R.anim.fade_out) .replace(R.id.content_frame, fragment, null)
.commit();
Any suggestions are welcome.