[KIE18]

Originally Posted by Doitsu

The same string (with a Roman numeral one) can also be found in my sample CP1251 epub.

I tried on the example of your rus_cp1251.epub file. Opened it in notepad++. Then I chose Win-1251 encoding. I copied everything (CTRL + A, CTRL + C). Closed the document. Created a new one. I pasted what I copied. And this is what happened (screenshot). And it is saved in txt. But I saved with the same epub extension. But the file didn't open at all.
Did I do everything right? If not, please explain more clearly. Maybe there is a video on YouTube that clearly solves this problem.