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.