ICS upgrade to Thunderbolt deleted my Family Contact Group from Home Screen
I had the same problem and just figured out how to fix it. 


Go to the screen on which you want to display your family contacts group. 
Press the screen until the 'Drag to rearrange, edit, or remove' message appears at the top of the screen. 
Drag the screen to the 'Edit' icon at the top left of the screen. 


You will get options to 'Select a group for widget' or 'Edit group.' 

If you choose 'Select a group for widget,' it will pull up your list of contact groups. 

Choose the one you wish to display.