Originally Posted by Hitch
"One option is to do a CTRL-A and change everything to Normal style, then modify the style to enforce the characteristics you want."
I make epubs in Sigil. There is no "CTRL-A" option for all files, and there is no "Normal" style.
Sounds like the epubs are being run through the Meatgrinder's verification process, rather than anything that checks "is this a valid EPUB," and doesn't worry about whether it's compatible with other formats, which won't be generated from it.