[Doitsu]

I just tested your files with Sigil 0.9.3 on my Windows machine and I wasn't able to reproduce your results.

The links in 0-3-contents.html are changed from:

<ol>
  <li><a href="../Text/1.html#hello-world">Chapter 1 – Hello world</a></li>
  <li><a href="../Text/1.html#goodbye-world">Chapter 2 – Goodbye world</a></li>
</ol>

to:

<ol>
  <li><a href="../Text/1.html#hello-world">Chapter 1 – Hello world</a></li>
  <li><a href="../Text/1_0001.html#goodbye-world">Chapter 2 – Goodbye world</a></li>
</ol>

and the report tool doesn't report any broken links.

However, I occasionally experienced broken links after file splitting with older Sigil versions, but I never could figure out what caused the problem.