At MediaWiki, clicking on an item near the bottom of the ToC (table of contents) at https://www.mediawiki.org/wiki/Talk:Phabricator/Help
resulted in no page action, and produced this webconsole error:
"[FLOW] " "apiPreHandler returned false" "topicList" Array [ Object, Object ] load.php:163:653 GET https://www.mediawiki.org/w/api.php [HTTP/1.1 200 OK 902ms] "[FLOW] " "Failed to render new topic" load.php:163:618 "[FLOW] " "Error in component handler:" "makeContentInteractive" TypeError: elem is undefined Stack trace: .dir@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150408T204940Z:41:662 .parents@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150408T204940Z:43:296 .map@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150408T204940Z:6:434 jQuery.fn[name]@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150408T204940Z:44:179 FlowComponent.prototype.getInstanceByElement@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150408T204940Z line 4 > eval:164:215 .proxy/proxy@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150408T204940Z:6:827 flowMakeContentInteractiveCallback@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150408T204940Z line 4 > eval:180:619 bindFlowComponentHandlers/</<@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150408T204940Z line 4 > eval:175:893 emitWithReturn@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150408T204940Z line 4 > eval:175:516 _flowBoardComponentLoadMoreFeatureRenderTopics@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150408T204940Z line 4 > eval:250:836 flowBoardComponentLoadMoreFeatureJumpTo/<@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150408T204940Z line 4 > eval:240:551 jQuery.Callbacks/fire@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150408T204940Z:45:106 jQuery.Callbacks/self.fireWith@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150408T204940Z:46:431 .Deferred/</deferred[tuple[0]]@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150408T204940Z:47:765 mw.Api.prototype.ajax/xhr<@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150408T204940Z line 4 > eval:29:224 jQuery.Callbacks/fire@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150408T204940Z:45:106 jQuery.Callbacks/self.fireWith@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150408T204940Z:46:431 done@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150408T204940Z:135:757 .send/callback@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150408T204940Z:141:562 Arguments { 0: Object, 2 more… } load.php:163:618 "[FLOW] " "Rendered topic not found when attempting to scroll!" load.php:163:618