There is an issue with displaying cyrillic (and other non-ASCII, I suppose) tags in discussions imported from comments on Stack Overflow in Russian:

Cyrillic tags from ru.stackoverflow.com are displayed as several question marks instead of their actual names. It's not code page problem - if you look it up in the page source, you'll see that tag name is actually bunch of question marks:

Even the URL consists of several %3f sequences (which is encoded ?) and leads nowhere.

Several examples:

http://chat.stackexchange.com/rooms/23200/ (messed up tag is верстка)

http://chat.stackexchange.com/rooms/23227/ (messed up tags are ошибка and список)

http://chat.stackexchange.com/rooms/23307/ (messed up tag is база-данных)

http://chat.stackexchange.com/rooms/23314/ (messed up tag is учебное-задание)

I suppose it's not ru.SO localization bug, but the bug of Stack Exchange chat engine, that's why I'm posting my question here.