[SBT]

Originally Posted by Doitsu

AFAIK, most new ADE4 features only work with ePub3 files. I.e., you'll have to code your ePub file as an ePub3 file to take advantage of the new ADE4 features.

I've created a simple test file with Sigil 0.8.4, converted it with the optional Sigil ePub3 plugin and both nowrap and the solid border top styles seem to work with ADE4.

Thanks for testing, Doitsu. Still, the odd thing is that this is an EPUB2 document which works in ADE2, but not in ADE4. The text inside the "nowrap" environment is a sequence of <span>-tags, but it does not include any explicit whitespace.