Ok, I downloaded the brand-new Fedora 8 iso file: [vmarko@sith ~]$ sha1sum Fedora-8-i386-DVD.iso 782a0e80de1b8e9f24e10e40055cc1b545390cbd Fedora-8-i386-DVD.iso After burning it to two dvd's on two different machines (one Windows, the other Linux) using different software (Nero and K3B), I get: [vmarko@sith ~]$ sha1sum /dev/dvd 04e39c4be1cf577b98a8b94ff61bdb60252ec6cb /dev/dvd where the checksum is *the same* (while being wrong) for both dvds. Nero and K3B reported no errors. None of the discs boots any machine I tried, but they do mount correctly: [root@sith ~]# mount /dev/dvd /media/ mount: block device /dev/dvd is write-protected, mounting read-only [root@sith ~]# ll /media/ total 860 -rw-r--r-- 1 root root 2882 2007-11-02 15:56 fedora.css -rw-r--r-- 1 root root 18363 2007-11-02 15:56 GPL drwxrwxr-x 4 root root 2048 2007-11-02 15:56 images drwxrwxr-x 2 root root 2048 2007-11-02 15:54 isolinux -rw-rw-r-- 1 root root 94 2007-11-02 15:59 media.repo drwxrwxr-x 2 root root 352256 2007-11-02 15:21 Packages -rw-r--r-- 1 root root 9680 2007-11-02 15:56 README-BURNING-ISOS-en_US.txt -rw-r--r-- 1 root root 172530 2007-11-02 15:56 RELEASE-NOTES-en_US.html drwxrwxr-x 2 root root 2048 2007-11-02 15:59 repodata drwxr-xr-x 3 root root 299008 2007-11-02 15:25 repoview -rw-r--r-- 1 root root 1910 2007-11-02 15:56 RPM-GPG-KEY -rw-r--r-- 1 root root 1706 2007-11-02 15:56 RPM-GPG-KEY-beta -rw-r--r-- 1 root root 1519 2007-11-02 15:56 RPM-GPG-KEY-fedora -rw-r--r-- 1 root root 1105 2007-11-02 15:56 RPM-GPG-KEY-fedora-rawhide -rw-r--r-- 1 root root 1076 2007-11-02 15:56 RPM-GPG-KEY-fedora-test -rw-r--r-- 1 root root 1232 2007-11-02 15:56 RPM-GPG-KEY-rawhide drwxr-xr-x 2 root root 4096 2007-11-02 15:56 stylesheet-images -r--r--r-- 1 root root 4290 2007-11-02 15:59 TRANS.TBL Is it gremlins, or am I missing something in K3B/Nero/elsewhere? I suspected hardware fault with first, but on two different machines I find that unlikely... :-( Marko Marko Vojinovic Institute of Physics University of Belgrade ====================== e-mail: vmarko@xxxxxxxxxxxx