Aburto-Rocha v. Mukasey, __ F.3d __, 2008 WL 2875384 (6th Cir. Jul. 28, 2008) (court has jurisdiction to review cancellation of removal hardship issue where noncitizen claims the BIA failed to follow own precedent, since "[t]he BIA's regulations themselves indicate that adherence to precedent is a non-discretionary act, as they require the agency to follow its own precedents except to the extent they are modified or overruled by the BIA or the Attorney General. See 8 C.F.R. 1003.1(g).").