Dokuwiki Angua new uploader works right in Latin based text and numbers.
But filename's first block make with Unicode text(like Korean, Japanese, Chinese), it will disapear.
For example, I upload 'a가나다.jpg', it works right. but I upload '가나다.jpg', it will change in '_.jpg'.
and I upload '가_나_다.jpg', it will change '_나_다.jpg'.
I can't change filename input uploader's filename change form, too.
I tested in Korean, Japanese, Chinese. I think it apear in all non-Latin texts.
I tested in DW angua. http://nex32.net/temp/wiki/