Were Bin Laden tapes: Fact or fiction?

Al Jazeera is not so sure anymore.

There is no reason whatsoever to believe that these audiotapes are authentic. While they are always followed by reports of scientific voice analyses, these studies have been invariably done by CIA experts. In fact, only one occasion was an independent analysis done. And while American officials were certain of the tape’s authenticity, Swedish scientists were convinced that it was fake.

This would have been the perfect timing for the tape. Bush's poll numbers are very low, the Republican scandals and the wiretapping of U.S. citizens.