BuddyPress.org

When I create a new group in English the slug is OK and I can go to this group page,but when I put a non – Unicode name(Hebrew) to a new group its automatically create a slug that is unreachable ,every time I try to go to this group I get thrown to home page .
My permalink is /%post_name%/ , and I can see a non – Unicode posts just fine, Its just the groups slugs with this error.
For now I using a plugin to give my members an option to change the group slug but this is not ideal.

thanks