It didn’t take long for some of President Obama’s doubters to claim the long-awaited birth certificate posted online by the White House on Wednesday had been altered or might be a fake. But a leading software expert says there’s no doubt about its authenticity, and he dismisses claims of fraud as flat-out wrong. The doubters have latched onto the idea that Adobe Illustrator — the premier program for computer graphic artists — “reveals” evidence of document manipulation in the Obama birth certificate. They note Illustrator reveals nine separate layers of the document, and claim it’s “proof” the file has been...