What makes this different from correct

If I could, I’d ask the Yahoo! Style writer if she knows what makes this wording different from, say, the correct wording:

The American Heritage Dictionary covers the use of different than and different from. Here’s the part that’s relevant, though you may want to read the full discussion:

Traditionally, from is used when the comparison is between two persons or things: My book is different from [not than] yours. Note that noun phrases, including ones that have clauses in them, also fall into this category: The campus is different from the way it was the last time you were here.

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