If I follow, the possible reasons for ineligibility are as follows:
1) Birth Certificate not real
2) Mom did not live 5 years in states after 16
3) O actually born in Kenya
4) Dual citizenship with Indonesia and/or Kenya
This is what I have distilled from this thread and one other.
There's also the issue of Obama being born as "Barry Soetoro."
He's an attorney. He knows the implications of NOT having his name legally changed and being different than the name appearing on the Presidential ballot.