Yes. If the Hawai'i Dept of Health said 'that copy is a crock and a half of shit', the conspiracy mongers would be on to something.You birthers are overthinking things. This is a CERTIFIED copy, certified by the Secretary of the State (HI) to be a true and correct copy of the document from their records. It is admissible in any court in the land as such.
We obviously don't have the original certified copy in our hands, that is in the White House. Do you honestly contend someone in the White House altered the certified copy or is it much more likely that the supposed irregularities you claim to see arose from the process of photocopying, scanning, etc. the certified copy for distribution to the media.
If only people spent a ten of this amount of effort on something that really matters.
Instead the Department of Health states they sent a certificate, and all is good.
http://hawaii.gov/health/vital-records/obama.html