[LarsEighner]

I could be wrong, but appears to me that when Sigil generates a TOC it 1) changes all existing ids to classes and 2) substitutes its own id, without adjusting existing internal links.

This breaks all internal links. I find it hard to call this anything other than a bug.


In addition there is a remote the risk that the class will coincide with a class that is already being used for something else in the stylesheet, so the element will appear with a style that is not intended.