@eureka: Ouch. No harm intended, at you or anyone else. I simply meant that since none of us wrote it and it's closed source, it's by definition potentially somewhat murkier than the rest. Quite frankly didn't even think about what you or others might have gone through to look into it. Mea culpa
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Speaking of, remind me to plug it into the Calibre Kindle Collection plugin, it's used by a fair number of people to use the same trick on older devices, but it doesn't handle this one yet.