See attachments in ZIP archive.
The two XML source files are the same except that one has the following tag:
and the other the following:
When both files are epub'ed, the generated toc.ncx files are different. The first file contains:
while the second file contains:
I have no idea what is happening.
The consequence of this is that titlepage/copyright information contained in
<book><info> ... </info></book>
is not accessible in the epub file.
A shell script is attached that generates the epub files.