Website is not responding and editor disappeared

[0zz]

ok, I did successfully update the website and some plugins, including I18N of course.
I've also changed permissions of pagex.xml to 777

But! I've just noticed, that I have "UZ" and "UZ" language columns, not "RU" and "UZ". When i try to set "RU" as a default lang for creating pages, the left column becomes "RU", however it turns back to "UZ" when I refresh the "pages" page.. ((