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Microsoft fixes the Excel feature that was wrecking scientific data
(www.theverge.com)
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That assumption is perfectly good for a default. Not a mandatory feature that power users have to live with.
As a default, sure. Should be one that's easily changed, though. Repeatedly fighting the machine that's supposed to do your bidding and make your life easier gets old rather quickly. A machine you own and administrate, let's not forget that.