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Old 01-22-2011, 08:08 AM   #9
LGN
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Device: ProMedia eReader, Sony PRS-600
Use FlightCrew epub checker, its also in Sigil, for far better reporting.
To be honest, there should absolutely no need to fiddle with an unzipped ePUB, just use Sigil.
The error you get seems like your headings have no unique ID's. Did you copy-paste some headings in your ePUB production?
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