bug in setRedirect with UTF8 URL using IE

[grunt2001c]

Hello,
There is a bug in Internet explorer with $this->setRedirect(ZefaniabibleHelper::urlRequest());
when the URL is something like this.
http://somedomain.com/standard1/standar ... глава.html
in IE when you use a form with redirect above you get redirected with URL now being
http://somedomain.com/standard1/standar ... °Ð²Ð°.html as an example. and when you have some UTF8 aliases in the URL you get template not found error i believe.

I did by pass the bug using header redirect
header('Location: '.JURI::root(true).ZefaniabibleHelper::urlRequest());

[grunt2001c]

here is the page where you can see the error.
http://www.russianchurchalbany.com/библия/библия.html