Given that I've found this plugin to be what is probably the single best plugin for wiki maintenance, and given that I don't know a lick of PHP (or programming for that matter), I'd like to request an update to this plugin for the 2011-05-25 "Rincewind" version of Dokuwiki.
This plugin is really great to search for orphans, broken links or wanted pages. On a busy wiki where the structure changes this can happen from time to time. If the wiki is additional used to share a lot of documents it is hard to now which if the documents are linked at all. An option to search for orphaned media files could help during the process of cleaning up a wiki.
In our team we share for example our projects reports on the wiki. During writing such a report we upload multiple revisions of such a document. When finished, all links to interim revisions will be removed. The problem is that not everyone does also remove the interim documents itself. This way the wiki grows and grows. Without a tool to find media files which are not linked any more there is little chance to stop it from growing.