WikiTool vs. case of undefined links

I think this is a bug in the WikiTool.  It doesn't respect the case of
undefined links.

I created a new page using the WikiTool.  On the page, I named a link to
a page that doesn't exist.  E.g. 

  See ThisPage_.

Then I viewed my new page and clicked on the ThisPage link.  WikiTool
gave it the id "thispage" instead of "ThisPage".  I didn't think to
change it when I edited ThisPage.  Later, I went to change the id to
"ThisPage" and found that the WikiTool didn't change the target in the
referring pages.

Is this another case where I have to re-render with the UpstreamTool?

David