Reference the following examples:
http://www.wikilivres.ca/wiki/File:PhotographyTheoryAndPracticeOCRed.djvu#filehistory
http://wiki.doughendrick.com/wiki/File:Three_Books_of_Occult_Philosophy_(De_Occulta_Philosophia)_(1651).djvu
http://commons.wikimedia.beta.wmflabs.org/wiki/Help:DjVu
DjVu files are not thumbnailing.
For file space, the description page is displaying but the image is replaced with a gray box and the words: "Error creating thumbnail: Unable to fetch XML for DjVu file". A similar result is obtained when the djvu is called inline as a
There is know documentation for this issue.
However, compare:
http://en.wikisource.org/wiki/File:Three_Books_of_Occult_Philosophy_(De_Occulta_Philosophia)_(1651).djvu
Use of DjVus on all Wikisources via InstantCommons is standard and does not exhibit this problem.
This issue has not been tested yet with pdfs or paged tiffs.
Version: unspecified
Severity: normal