Lawrence v. Gonzales, ___ F.3d ___, 2006 WL 1195679 (1st Cir. May 5, 2006) (where pre-IIRAIRA conviction was vacated on a basis of legal invalidity, but replaced with a new plea after IIRAIRA that also triggers removal, a waiver under INA 212(c) is unavailable where the new plea was not entered nunc pro tunc).