I had the same problem as you since I had updated the SDK.
I have solved my problem by doing this (on eclipse) :
- Right click on the action bar sherlock library =>
Properties=>Java Build Path=>Order and Exporttab => checkandroid support v4orAndroid Private Librariesand select Ok - Right click on your personal project and go to properties => java build path =>
check Android Private Libraries - Clean both projects, it should work.