Originally Posted by RAH
Just as a test, using Sigil I inserted a split in the split_003.html file inside the epub at the place where it was screwing up - at the split between Chapter 17 and 18. It now seems to work fine on a Nook. I only tried it in Nook for PC, but I'll bet it works OK on the Touch too. I have attached the file.
The split_003.html file was too large, or the Nook can not handle the normal max 260k size split file.
I checked the file sizes, old size for split_003.html was 242.9 kB (242,900 bytes), after the fix it was 175.5 kB (175,507 bytes).