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Based on your original report I thought the hyphens were being retained in all cases. The behavior you're seeing is by design. Hyphens can't be universally eliminated, as some words/phrases are always supposed to be hyphenated. The only way to decide what hyphens can be safely removed is to use a dictionary. However users all over the world use Calibre in many languages, and most books also use proper names, made up words, or scientific words which won't appear in any dictionary. In order to work around all that Calibre uses the book itself as its' dictionary. Hyphens are only removed if the word appears in the book without a hyphen. So those cases where there is still a hyphen means that word didn't occur a second time in the book. (alla may be an exception, a side affect of some recent work on reducing false positives)
Last edited by ldolse; 02-19-2011 at 11:39 AM.