Last modified: 2012-04-16 09:15:52 UTC
There seems to be some references to legacy globals in mediawiki.* code, for example mediawiki.util.js use of wgServer + wgArticlePath, They should instead use the mw.config.get option.
Fixed in r80572. According to grep in /resources the only occurrences of "wg" are either in mw.config.* calls or wgAjaxWatch (which needs to be rewritten).