Yes, I do apply Smarten Punctuation directly on the EPUB before converting.
I should have checked back on this thread earlier I guess!
Sorry I didn't clarify.
I shall test this immediately. Incidentally, one of the fanfics I follow has a new update out today. Let's see …
… aaand it worked flawlessly \o/. No errors in the download log and the punctuation is smartened just like when I apply it manually. Jimm, thank you a lot for implementing this, and so quickly as well! :-)