Perez-Vargas v. Gonzales, 478 F.3d 191 (4th Cir. Feb. 22, 2007) (Immigration Judge has jurisdiction to determine whether an approved visa petition remains valid under applicable law; for example, IJ can determine whether employment violated visa and therefore disqualified noncitizen from adjustment of status), vacating Matter of Perez-Vargas, 23 I. & N. Dec. 829 (BIA 2005), within the Fourth Circuit.
http://caselaw.lp.findlaw.com/data2/circs/4th/052313p.pdf



NOTE: This case does not upset the applicability of Matter of Perez-Vargas outside the Fourth Circuit.