It could be that I have this confused with some other feature of IE. Anyway, from what I can remember about a post I read on this it is because that feature is actually patented by someone and MS is not willing to take the risk that they will be sued to high heavens for putting patented stuff on 300,000,000+ machines. I guess the Eolas thing is still reverberating around in MS.
However, maybe I'm not remembering correctly and it had nothing to do with this.
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However, maybe I'm not remembering correctly and it had nothing to do with this.