I run into retail epubs all the time whose uid in the ncx doesn't match the opf uid. I match them up when I notice the discrepancy, but I have to seriously wonder if it really matters one single bit in the "real world."
When using Sigil, don't be afraid to alter the NCX dbt:uid value to match the OPF's uid. It's getting the OPF wrong that can wreak havoc.
Last edited by DiapDealer; 08-01-2016 at 11:12 AM.
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