What President Obama released in 2008 was his 'certificate of live birth', which is not a birth certificate, in 2008.  

For a passport, this is shows the difference between the two. 
 "For passport applicants who do not have a certified birth certificate, a hospital's certificate of live birth is accepted as proof of citizenship ***when accompanied by additional documentation." 
http://traveltips.usatoday.com/certificate-live-birth-sufficient-passport-62732.html 

In 2011, he released his birth certificate, which is what I had said.

In the next year or so, I fully expect we will view a redacted copy of President Trump's personal tax returns.