At https://www.mediawiki.org/wiki/Special:NewMessages I'm getting this error message in webconsole:
```
"Exception thrown by ext.math.editbutton.enabler" load.php:150
"TypeError: mw.toolbar is undefined" TypeError: mw.toolbar is undefined
Stack trace:
@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150107T194503Z line 4 > eval:2:2316
@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150107T194503Z line 4 > eval:2:2235
runScript@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150107T194503Z:161:128
execute/</checkCssHandles@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150107T194503Z:161:613
execute@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150107T194503Z:162:392
handlePending@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150107T194503Z:159:664
runScript@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150107T194503Z:161:140
execute/</checkCssHandles@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150107T194503Z:161:613
execute/</cssHandle/<@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150107T194503Z:161:743
jQuery.Callbacks/fire@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150107T194503Z: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=20150107T194503Z:46:431
jQuery.Callbacks/self.fire@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150107T194503Z:46:474
addEmbeddedCSS@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150107T194503Z:156:502
execute@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150107T194503Z:162:199
mw.loader</<.implement@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150107T194503Z:168:858
@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150107T194503Z line 4 > eval:38:951
.globalEval/<@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150107T194503Z:4:666
.globalEval@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150107T194503Z:4:632
mw.loader</<.work@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150107T194503Z:164:718
request@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150107T194503Z:162:903
mw.loader</<.load@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150107T194503Z:170:449
@https://www.mediawiki.org/wiki/Special:NewMessages:571:1
```
It doesn't seem to be a problem on any other pages that I can find.