This might help. See below, I found this under the following link:
Windows partitions use CP850 encoding, not ISO-8859-1 encoding. If you are unfortunate enough to transfer files from a Windows partition to an ext3 partition, and you forget to mount the partition using nls=utf8, you need to convert your filenames using:
convmv -f cp850 -t utf-8 -r *.*
There are Nautilus scripts and Konqueror service menus available that will perform this operation for you as well.
If you have archives of ISO-8859-1 encoded files, you need use the following to convert the filenames of your extracted files to UTF-8:
convmv -f iso-8859-1 -t utf-8 -r *.*
convmv can handle many different encodings: