I just purchased a new m250 with the latest Firmware Version 184.108.40.206A. It would not display the artists, albums, or the song titles in Chinese characters. Instead, it displays ??? marks. My old m230 displays the same tag info in Chinese without any problem, so does a newer Sansa Clip 2GB.
I tried switching the language setting to Chinese. The problem persisted.
I would greatly appreciate any suggestion in solving this problem. Thank you.