Following the update to 1.19wmf1 English Wikisource has a break in the side by side viewing of text and image. This basically prevents all use of affected browsers from this functionality. Mostly seems related to vector skin. [Note that FF 10.0.2 unaffected]

Default skin of vector

View https://en.wikisource.org/w/index.php?title=Page:Chesterton_-_A_Short_History_of_England.djvu/214&useskin=vector

Edit https://en.wikisource.org/w/index.php?title=Page:Chesterton_-_A_Short_History_of_England.djvu/214&action=edit&useskin=vector

Monbook

View https://en.wikisource.org/w/index.php?title=Page:Chesterton_-_A_Short_History_of_England.djvu/214&useskin=monobook

Edit https://en.wikisource.org/w/index.php?title=Page:Chesterton_-_A_Short_History_of_England.djvu/214&action=edit&useskin=monobook

Also seeing some image load and lag issues on the pages, presumably related

https://en.wikisource.org/wiki/Wikisource:Scriptorium#Side_by_side_broken

Error log when loading page in vector (not no errors when loading in monobook)

Uncaught TypeError: Object [object Object] has no method 'addSource'
startUpload.php:1
(anonymous function)load.php:151
load.php:142Uncaught TypeError: Cannot read property 'options' of undefined
executeload.php:142
loader.implementload.php:148
(anonymous function)index.php:27
index.php:1127Uncaught TypeError: Cannot call method 'addButton' of undefined
(anonymous function)index.php:1127
loader.usingload.php:148
(anonymous function)index.php:1127
index.php:41Uncaught ReferenceError: addOnloadHook is not defined
(anonymous function)index.php:41
load.php:5Uncaught ReferenceError: addOnloadHook is not defined
(anonymous function)load.php:5
index.php:198Uncaught ReferenceError: addOnloadHook is not defined
(anonymous function)index.php:198
index.php:94Uncaught ReferenceError: addOnloadHook is not defined
(anonymous function)index.php:94
index.php:75Uncaught ReferenceError: addOnloadHook is not defined
(anonymous function)index.php:75
index.php:109Uncaught ReferenceError: addOnloadHook is not defined
(anonymous function)index.php:109
index.php:95Uncaught ReferenceError: hookEvent is not defined
(anonymous function)index.php:95
index.php:83Uncaught ReferenceError: addOnloadHook is not defined
(anonymous function)index.php:83
index.php:86Uncaught TypeError: Cannot call method 'wikiScript' of undefined
mw.loader.using.$.centralNotice.fn.loadBannerListindex.php:86
(anonymous function)index.php:152
jQuery.extend._Deferred.deferred.resolveWithload.php:14
jQuery.extend.readyload.php:6
DOMContentLoadedload.php:12

Version: unspecified
Severity: major