Sometimes it is annoying that ubuntu / Gnome opens USB mass storage devices such as sticks or cardreaders vfat partitions in uppercase by default. In order to change this adapt the mount settings in gconf path /system/storage/default_options/vfat/mount_options. gconf can be configured with the command line gconftool-2 or the graphical gconf-editor.
The gconf default setting for vfat is “shortname=mixed”. Just change it to “shortname=lower”. See also mount (8) manpage.