Quote:
Originally Posted by eschwartz
Fortunately, calibre conversions will generate an exth 113 field from a UUID, unless you manually set it with Quality Check or something.
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The only reason I said anything is on technical grounds, because it was incorrect -- even if most people don't have to worry about that. It's basically just nitpicky details for perfectionist helpdesk-ers.
calibre conversions are always unique.
You have to deliberately modify the metadata headers to create a clash.
That, or change the title in calibre and update the metadata of an existing book, then send
both copies to your Kindle... which implies keeping two ebooks that are absolutely identical other than the title. But there is no reason to do that if the contents are the same, right?

So that doesn't tend to happen either.
...
Apologies if I have caused unnecessary confusion.