Up until January 16, 1996, Pennsylvania law allowed a prisoner to file, without time limits, successive petitions for post-conviction relief. See Commonwealth v. Peterkin, 554 Pa. 547, 722 A.2d 638, 642 (1998); see also Commonwealth v. Travaglia, 541 Pa. 108, 661 A.2d 352 (1995) (involving a second petition for post-conviction relief); Commonwealth v. Waddy, 497 Pa. 449, 441 A.2d 1224 (1982) (involving a third petition); Commonwealth v. Yount, 419 Pa.Super. 613, 615 A.2d 1316 (1992) (involving a third petition). Despite the prohibition in § 9543(a)(3) against raising waived claims in PCRA petitions, it was the Pennsylvania Supreme Court's practice "to address all issues arising in a death penalty case, irrespective of a finding of waiver ."