seen in Chrome and Firefox. symptom is that left navigation does not work, nor does search suggest.
Uncaught TypeError: Cannot read property 'verify' of undefined load.php?debug=false&lang=en&modules=site&only=scripts&skin=vector&*:10
Failed to load resource: the server responded with a status of 404 (Not Found) http://upload.beta.wmflabs.org/wikipedia/en/b/bc/Wiki.png
Exception thrown by skins.vector.js: Object [object Object] has no method 'collapsibleTabs' load.php?debug=false&lang=en&modules=jquery%2Cmediawiki%2CSpinner%7Cjquery.…%7Cmw.MwEmbedSupport&only=scripts&skin=vector&version=20130506T215507Z:151
TypeError
load.php?debug=false&lang=en&modules=jquery%2Cmediawiki%2CSpinner%7Cjquery.…%7Cmw.MwEmbedSupport&only=scripts&skin=vector&version=20130506T215507Z:151
ULS: Unknown language doi. load.php?debug=false&lang=en&modules=ext.centralNotice.bannerController%7Ce…parser%7Cmediawiki.page.startup&skin=vector&version=20130620T151436Z&*:233
ULS: Unknown language fonipa. load.php?debug=false&lang=en&modules=ext.centralNotice.bannerController%7Ce…parser%7Cmediawiki.page.startup&skin=vector&version=20130620T151436Z&*:233
[08:56:19.888] TypeError: $.aftUtils is undefined @ http://en.wikipedia.beta.wmflabs.org/w/load.php?debug=false&lang=en&modules=site&only=scripts&skin=vector&*:10
[08:56:20.126] Exception thrown by skins.vector.js: $(...).bind(...).bind(...).collapsibleTabs is not a function
[08:56:20.126] (new TypeError("$(...).bind(...).bind(...).collapsibleTabs is not a function", "http://en.wikipedia.beta.wmflabs.org/w/load.php?debug=false&lang=en&modules=ext.articleFeedbackv5.startup%7Cext.eventLogging%2CmarkAsHelpful%7Cext.gadget.PagesForDeletion%2CwmfFR2011Style%7Cext.gettingstarted.logging%2CopenTask%7Cjquery.articleFeedbackv5.utils%7Cjquery.autoEllipsis%2CcheckboxShiftClick%2CdelayedBind%2Chidpi%2ChighlightText%2CmakeCollapsible%2Cmw-jump%2Cplaceholder%2Csuggestions%2CtabIndex%7Cmediawiki.Title%2Chidpi%2CsearchSuggest%7Cmediawiki.action.view.postEdit%7Cmediawiki.page.ready%7Cmobile.desktop%7Cmw.MwEmbedSupport.style%7Cmw.PopUpMediaTransform%7Cschema.GettingStartedNavbar%7Cskins.vector.js&skin=vector&version=20130620T151943Z&*", 75))
[08:56:24.971] ULS: Unknown language doi.
[08:56:24.972] ULS: Unknown language fonipa.
Version: unspecified
Severity: major