Filename errors whe copying to USB storage

[TuringTest]

I have a 256Mb USB Mp3 player, formated with vfat filesystem. When 
copying files to it, either with Nautilus or the command line, it changes the 
filename to the old 8:3 MS-DOS format.

The problem is when I copy several files wich have the same 8 first letters -
for example:

gloria_estefan-01-con_los_anos_que_me_quedan.mp3
gloria_estefan-02-como_me_duele_perderte.mp3
gloria_estefan-03-tu_fotografia.mp3
gloria_estefan-04-en_el_jardin_(feat_alejandro_fernande.mp3
gloria_estefan-05-no_pretendo.mp3
...

It generates only one file, with the name:

gloria_e.mp3

It contains the last copied file. Any later attempt to copy another file with
the same first letters just replaces the contents of this file with 
the new one.

I've tried it in two computers, both with the latest Hoary upgraded 
from Warty.

I've filed a bug report to the Ubuntu bugzilla:
https://bugzilla.ubuntu.com/show_bug.cgi?id=10119

Is there a solution for this error? Could I somehow mount it manually specifying
the vfat system so that it recognize it?