Last modified: 2011-02-08 21:56:34 UTC
The margin around floated thumbnails is forced to be while. Especially when used in an element with toccolours or when used in the {{Information}} template on Commons, this gives an ugly edge. See also: http://www.mediawiki.org/w/index.php?title=Sandbox&oldid=371897 Assigning to myself, I've fixed this on a few local wikis and if I see no collisions, I'll put it in core as this is a general MediaWiki bug and not specific to Wikimedia.
To see status in trunk, link to similar demo on TW: http://translatewiki.net/w/i.php?title=Sandbox&oldid=2584255
Fixed in r79010 & r79011.
*** This bug has been marked as a duplicate of bug 8814 ***