With the recent addition of `emacs-wiki-link-escape' and `emacs-wiki-link-unescape', links are now unescaped before displaying. This makes them uneditable. People probably shouldn't be editing the links manually as this can screw up planner links (among others), but I should provide an easy way to edit the link at point. I have a function in my emacs-wiki-config.el to do that. I'll probably bind to C-c C-e, which makes sense.