Android: getSupportActionBar() always returns null in ActionBarSherlock library

I'm trying to use the ActionBarSherlock library to provide backwards compatible ActionBar support with tabs in my Android app, so I downloaded the latest build, built the demo, and ran it.

Start ICS emulator without Menu button

I'm trying to see the overflow menu in the ActionBar on ICS and I don't have a device.

getActionBar() returns null

I'm having an odd problem. I am making an app with targetsdk 13.

Overriding android:ellipsize on ActionBar subtitle

My activity makes use of the ActionBar.setSubtitle function to display the currently displayed file system location's full path. This means that the substring towards the end of the subtitle is more relevant than the beginning, so I thought I would override the ActionBar style to ellipsize text at the start, rather than the end, like so: