Redmine

I have updated Redmine to 2.0.1.
Now I receive JS exception on every page (visible in Firebug)

document.on is not a function
WarnLeavingUnsaved is not defined

And when I tries to attach file to issue i see

checkFileSize is not defined

And "Add another file" button doesn't work and produce another JS exception

$("attachment_description_label_content") is null
[Break On This Error]
dLabel.update($('attachment_description_label_content').innerHTML)