DaCosta v. Gonzales, 449 F.3d 45 (1st Cir. May 24, 2006) (court lacks jurisdiction to review claims where BIA was not presented with opportunity to address legal questions raised for the first time on appeal to the circuit court), citing Olujoke v. Gonzales, 411 F.3d 16, 23 (1st Cir. 2005) (circuit courts lack authority "to consider points not squarely raised before the BIA").
http://laws.lp.findlaw.com/1st/051438.html