I also recently encountered a similar issue, all my wiki entries were not also renamed, basically had the old project name as first part of url

I’ve jsut seen that this case is exactly what we are talking about [#591]. Sorry for the dupplicate.
I think that, as a default behavior, when renaming a project it’s home page should be renamed as well.
If the user want a fresh new home page, he could then rename the current one to old_myproject or whatever and create a new one.

The main reason for not doing it are potential links to this page. If a project is renamed and you rename the main wiki page, the user would have to manually update all links to this page.

I will change the default behaviour here, but please keep this in mind.

Thx Dimitrij :)