I belive Al-Q is made up of two distinct groups, the Egyptians and the Saudis, the later group is wider then just Saudis but whatever, it was bin-Ladens hangarounds. The Egyptians where a group centered around al-Zawahiri.
Either those groups split (I'm not sure what keept al Q together at this time), or the al-Zawahiri take over. He had different ideas I belive, wanting to surgicly (he is a doctor after all) remove the leadership in Egypt (or other countries with a islamic population I suppose) and make it into a islamic state, according to his ideas of a islamic state.
I don't know, maybe they kill a head of state or something.