Last modified: 2014-11-17 14:32:16 UTC
Parsoid output has broken output because Mediawiki:common.css is not included. For example: http://parsoid-lb.eqiad.wikimedia.org/frwiki/Guerre_froide?oldid=108085194 Here the original version: https://fr.wikipedia.org/w/index.php?title=Guerre_froide&oldid=108085194 And with the visual editor: https://fr.wikipedia.org/w/index.php?title=Guerre_froide&oldid=108085194&veaction=edit Like you can see the infobox width is huge probably because there is no rule for the "infobox_v2" CSS class.
Mediawiki:Common.css is included by the parsoid-rendered page, you can see this inspecting the infobox table with Firebug (or similar). The rendering problem comes from the navboxes at the end, which have all the links in each cell in the 2nd column in the same line, instead of wrapping them. If (using Firebug) the .nowrap style (or just "white-space: nowrap;") is disabled, the page returns to a more appropriate width. The only difference I can see in the HTML is the presence of multiple mw:Entity elements to indicate the white-space present in wikitext, so maybe that's what's interfering with nowrap.
I don't think it is mw:Entity entirely ... I am testing a html dump from that page where I replaced the mw:Entity with space or the entity as in the PHP html and it didn't change the rendering substantially. This requires some more digging into the HTML diffs between the two.