device and fstab permissions

[dabicho]

Hello.
I am running Fedora Core 3 and I'm having problems with permissions for
/dev/hdc and /etc/fstab

I have some users in the disk group so that they can access the device, but
some process keeps setting it tu u+rw thus removing access to the group and
others.
The same thing happens with /etc/fstab which all of a sudden has read
permissions only for the owner (root)

This breaks some scripts I run as they run from another user to create
multisession iso images.

Anyone has a clue who the culprit might be?

It does not look like it is in /etc/security/console.perms as it doesn't
list /dev/hd and /etc/udev/permissions.d has it properly set to 0660
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