That seems correct. Device nodes don't tend to take up any space. Now
try it again on the filesystem (like I showed you).
Ok, here follows the "relevant" ouput.
Apart from spf13 vim environment, that I can remove for root user, I guess my only choice would be a pruned custom kernel... am I wrong?
6,6M /root/.spf13-vim-3/.vim/bundle/PIV/doc
6,8M /bin
7,1M /lib/modules/3.2.0-2-amd64/kernel/drivers/scsi
8,1M /lib/modules/3.2.0-2-amd64/kernel/net
9,2M /lib/x86_64-linux-gnu
12M /boot/initrd.img-3.2.0-2-amd64
12M /lib/modules/3.2.0-2-amd64/kernel/drivers/media
12M /lib/modules/3.2.0-2-amd64/kernel/fs
14M /root/.spf13-vim-3/.vim/bundle/PIV
17M /lib/modules/3.2.0-2-amd64/kernel/drivers/net
21M /boot
40M /root/.spf13-vim-3/.vim
40M /root/.spf13-vim-3/.vim/bundle
43M /root/.spf13-vim-3
45M /root
71M /lib/modules/3.2.0-2-amd64/kernel/drivers
100M /lib/modules/3.2.0-2-amd64/kernel
102M /lib/modules/3.2.0-2-amd64
103M /lib/modules
120M /lib
201M /