Please, prompt to me!

Please, prompt to me.
Such situation:
I write title of a post in a blog on Cyrillics: "Блог пост 2".
I receive the link to a post of such kind: "http://localhost/elgg/blog/view/62/-2"...
Why the link not the such as "http://localhost/elgg/blog/view/62/блог-пост-2"?
In what the reason?
Version Elgg - 1.8b1.

p.s.: sorry for my bad english :)