Last modified: 2014-07-23 20:07:22 UTC
eg. http://ee-flow.wmflabs.org/w/index.php?title=Sandbox&workflow=050a03a578eb34dffb6efa163e68c4ac#flow-post-050a03cd5cbb34dffb6efa163e68c4ac This image should have a border around it, because it's using the "thumb" parameter in the wikitext: [[File:NRHP Counties Net Quality.svg|thumb|right|400px|"Net Quality Rating" map, which is IMO a more accurate representation of progress in a county/state.]] (See also bug 57938 ("Flow: Image float alignment in posts doesn't work") in case related.)
The WMF core features team tracks this bug on Mingle card https://mingle.corp.wikimedia.org/projects/flow/cards/591, but people from the community are welcome to contribute here and in Gerrit.
Thumbnails will soon have no border.