Update: Problem seems to be resolved now--things have been working normally since sometime late yesterday.

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I suppose everybody is seeing the same malfunction I am: comment headers appear in the Recent Comments sidebar, but when you click on them nothing's there. I don't know what's going on. As you may or may not realize, the commenting function here is provided by Haloscan.com, which is an independent service--independent of Blogger, which provides the blogging software, and of the hosting service where this blog resides. Sometimes Haloscan is flaky. I'm thinking seriously about moving the blog to Wordpress or TypePad, which have built-in commenting (well, Blogger does, too, but for several good reasons with which I won't bore you I don't want to use it).

Anyway, I hope this will clear up soon.