Kovid,
I wonder if these two plugin issues might also be related?
Encoding error on convert after epubmerge:
https://www.mobileread.com/forums/sh...63#post3867663
.mo translation files converted .po by v3.45.2 are flawed, but v.3.44 work:
https://www.mobileread.com/forums/sh...94#post3867694