Last modified: 2014-05-21 04:02:16 UTC
eg. https://www.mediawiki.org/w/index.php?title=Talk:Sandbox&workflow=050de81ad9c16f3747a890b11c28d448#flow-post-050e363501180b35e457842b2b77d79c Clicking the image should open the Lightbox viewer (I have the BetaFeature enabled), but it currently just opens the [[mw:File:Test2.jpg]] page per the old/usual behaviour.
The WMF core features team tracks this bug on Mingle card https://wikimedia.mingle.thoughtworks.com/projects/flow/cards/718, but people from the community are welcome to contribute here and in Gerrit.
Eh, low-priority. Beta means Beta ;p.
Bumping importance, as Multimediaviewer is now a default feature on Mediawikiwiki, and will be on Enwiki as of May 22.