BuddyPress.org

Hi, after updated bp to 1.7.2, all the groups with foreign words (Chinese in my case) in the url are having problem display correctly.
If I copy and paste the url into the url address and enter the page will return Page not found.
example: http://example.com/test一些中文/

But if I use the ASCII version of the url it will work in the url address bar.
example: http://example.com/test%e4%b8%80%e4%ba%9b%e4%b8%ad%e6%96%87/

It will also work if I click on the link anywhere in the site.

So what is the problem preventing me from using the url in the url address bar?