I remember under Fedore core 5, if your files are stored on NTFS sector and they have a chinese filename, you can't see them under linux. This is really not a problem of knoppix. Instead, it is a problem of fuse.

I am using Knoppix 5.1.1 now. I can see those files if they are on FAT32 sector, but the chinese characters in the filename are shown as "???".