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The example introduced by erratum E26, which appears in section 13.1.3 of the PER, is incorrect. It states: As a further example, if lower-first is requested, then a sorted sequence might be "MacAndrew, macintosh, macIntosh, Macintosh, MacIntosh, macintoshes, Macintoshes, McIntosh". If upper-first is requested, the same sequence would sort as "MacAndrew, MacIntosh, Macintosh, macIntosh, macintosh, MacIntoshes, macintoshes, McIntosh" These are not in fact sorts of the same sequence. To correct the example, the antepenultimate string in the second sequence should be "Macintoshes" rather than "MacIntoshes". Michael Kay