I know that sounds self-evident. But a jurisdictional challenge is your last hope on appeal if you’re relying on procedural irregularities that you let pass without objection. That’s because a jurisdictional defect can be raised any time in the course of the proceedings, so a party on appeal does not have to worry about having waived it. But the appellant in In re Angel S., case no. C054446 (3d Dist. Oct. 23, 2007, modified and ordered published Nov. 13, 2007) isn’t able to pull it off. The appellant in Angel S. had her probate guardianship of her 2-year-old great niece terminated after the girl suffered severe head injuries in appellant’s…