bugs in df

Hi! I made some nice experiences with df:

flapp:/mnt/dvd # df
Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/root             19228276  19228276         0 100% /
/dev/cdroms/cdrom0       72434     72434         0 100% /mnt/dvd

--> seems to be fine..

flapp:/mnt/dvd # df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/root              18G   19G     0 100% /
/dev/cdroms/cdrom0     71M   71M     0 100% /mnt/dvd

--> used 19 G of 18 G ?

flapp:/home/user/nico # du /mnt/dvd/ -sh
505M    /mnt/dvd

--> ??? there are 505MB and not 71M on the cd, how does df get those
    misinformations ?

I am using 2.5.53,ext3 on /dev/root,isofs on /mnt/dvd and df is
flapp:/home/user/nico # df --version
df (GNU fileutils) 4.0.35

Did you hear of this ?

Greetings,

Nico

p.s.: please cc-me.

-- 
Please send your messages pgp-signed and/or pgp-encrypted (don't encrypt mails
to mailing list!). If you don't know what pgp is visit www.gnupg.org.
(public pgp key: ftp.schottelius.org/pub/familiy/nico/pgp-key)

_______________________________________________
Bug-fileutils mailing list
[email protected]
http://mail.gnu.org/mailman/listinfo/bug-fileutils

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.7 (GNU/Linux)

iD8DBQE+EaVctnlUggLJsX0RAmUsAKCen4cR61C9rNe5376p2W1BeS3hGQCfcwaL
lN+1qGtwDlWq0eP//uWSwQk=
=Vv3x
-----END PGP SIGNATURE-----