Win 7, Google Chrome (all updates applied) same behavior using Win 7 and Firefox.
Attempting upload of up to 50 images from Flickr using the assistant for uploading. Out of 50 files only 3 or 4 will survive the trip from being selected to the edit page. Also the part of the form where users can copy categories, descriptions, etc. is missing. See screenshot.
Uncaught TypeError: Cannot read property 'toggle' of undefined
at mw.UploadWizardDetails.useCustomDeedChooser (load.php?debug=false&lang=de&modules=ext.uploadWizard&skin=vector&version=0arq8yq:113) at MWUploadWizardUpload.eval (eval at <anonymous> (/w/load.php?debug=false&lang=de&modules=jquery%2Cmediawiki%7Cmediawiki.legacy.wikibits&only=scripts&skin=vector&version=0r0nkm9:4), <anonymous>:336:726) at Function.each (/w/load.php?debug=false&lang=de&modules=jquery%2Cmediawiki%7Cmediawiki.legacy.wikibits&only=scripts&skin=vector&version=0r0nkm9:5) at UWControllerDetails.uw.controller.Details.load (eval at <anonymous> (/w/load.php?debug=false&lang=de&modules=jquery%2Cmediawiki%7Cmediawiki.legacy.wikibits&only=scripts&skin=vector&version=0r0nkm9:4), <anonymous>:336:477) at UWControllerDeed.uw.controller.Step.moveNext (eval at <anonymous> (/w/load.php?debug=false&lang=de&modules=jquery%2Cmediawiki%7Cmediawiki.legacy.wikibits&only=scripts&skin=vector&version=0r0nkm9:4), <anonymous>:294:734) at UWControllerDeed.uw.controller.Deed.moveNext (eval at <anonymous> (/w/load.php?debug=false&lang=de&modules=jquery%2Cmediawiki%7Cmediawiki.legacy.wikibits&only=scripts&skin=vector&version=0r0nkm9:4), <anonymous>:320:2738) at UWControllerDeed.uw.controller.Deed.load (eval at <anonymous> (/w/load.php?debug=false&lang=de&modules=jquery%2Cmediawiki%7Cmediawiki.legacy.wikibits&only=scripts&skin=vector&version=0r0nkm9:4), <anonymous>:321:276) at UWControllerUpload.uw.controller.Step.moveNext (eval at <anonymous> (/w/load.php?debug=false&lang=de&modules=jquery%2Cmediawiki%7Cmediawiki.legacy.wikibits&only=scripts&skin=vector&version=0r0nkm9:4), <anonymous>:294:734) at UWControllerUpload.uw.controller.Upload.moveNext (eval at <anonymous> (/w/load.php?debug=false&lang=de&modules=jquery%2Cmediawiki%7Cmediawiki.legacy.wikibits&only=scripts&skin=vector&version=0r0nkm9:4), <anonymous>:360:536) at eval (eval at <anonymous> (/w/load.php?debug=false&lang=de&modules=jquery%2Cmediawiki%7Cmediawiki.legacy.wikibits&only=scripts&skin=vector&version=0r0nkm9:4), <anonymous>:293:624)
/w/api.php?action=query&format=json&titles=File%3A03+00437%2Ejpg&prop=info%7Cimageinfo&inprop=protection&iiprop=url%7Cmime%7Csize&iiurlwidth=150 Failed to load resource: net::ERR_NAME_NOT_RESOLVED
/w/api.php?action=query&format=json&generator=allpages&gapnamespace=6&gappr…info%7Cimageinfo&inprop=protection&iiprop=url%7Cmime%7Csize&iiurlwidth=150 Failed to load resource: net::ERR_NAME_NOT_RESOLVED