To be honest, from my point of view, as a bot operator/programmer, I am quite happy with this bug.
But for folks using Wikipedia in Russian, Ukrainian, Belarus, Bulgarian, Serbian, it is ugly.
Example,
http://ru.wikipedia.org/wiki/%D0%97%D0%B0%D0%B3%D0%BB%D0%B0%D0%B2%D0%BD%D0%B...
is Main Page URL. Do you want to type it?
See http://en.wikipedia.org/wiki/Internationalized_Resource_Identifier
With the command tool in Windows not allowing cut-and-paste
It is possible. Try to use menu in top left angle of window
-- Amike kaj kunlabore, Aleks