We granted the plaintiff's petition for certification to appeal, limited to the following issue: "Did the Appellate Court properly conclude that a stipulated judgment in a zone change appeal modified the regulations applicable to a subsequent special use and site plan application?" Torrington v. Zoning Commission, 258 Conn. 907, 782 A.2d 1242 (2001). Despite the formulation of this question, we have determined, as we explain in the text of this opinion, that the appeal is more appropriately analyzed under the rubric of the defendants' alternate ground for affirmance, namely, whether, on the record demonstrated by the present case, the plaintiff was entitled to mount a collateral attack on the stipulated judgment in question.