android - Main action bar does not show on 2.3.6 device, but the contextual bar works correctly

Question

I just deployed an ActionBarSherlock app to a 2.3.6 device, but the main action bar does not show. I tested the contextual action bar on a ListView item, and it works correctly. I am using Theme.Sherlock.Light for my theme. Any idea what could be causing this problem?

Additional Information:

• Samsung Galaxy Ace
• LDPI - 480 x 320
• Targeting API Level 18
• Min API Level 10

Edit 1:

I wanted to add this in case it may be related, maps v2 also doesn't load correctly on the Galaxy Ace.