Thanks to Grammar Girl and Law.com, we are informed about a critical SCOTUS discussion of apostrophes:
As one of its final acts last term, the U.S. Supreme Court issued Kansas v. Marsh, a case involving the constitutionality of a state death-penalty statute. The 5-4 decision exposed the deep divide that exists among the nation's intellectual elite regarding one of society's most troubling issues -- namely, whether the possessive form of a singular noun ending with the letter "s" requires an additional "s" after the apostrophe.
And, as previously mentioned, Apostrophe Catastrophe never runs out of material to show us:
and others never run out of ways to provide it:
And, arrggh, there's this abomination from
Pirates of the Caribbean: At Worlds End.