Voting Rights in the Supreme Court

Interesting piece from Slate.com about the recent Supreme Court decision upholding an Indiana voter ID law...which the author sees as potentially in violation of poll-tax requirements forbidden by the 24th Amendment. I'm not going to claim to have personally reviewed the decision itself or anything, but the Court apparently didn't address the 24th at all, thus "utterly failed to address the most obviously relevant provision of the constitutional text". And that's kind of weird I think.