Description of problem:
I have some DVD-ROMs that I burned using dvdrecord on an ISO-9660 image I created with K3B. Upon inserting them, I am greeted with the message:


Error mounting: mount: block device /dev/sr0 is write-protected, mounting read-only
mount: wrong fs type, bad option, bad superblock on /dev/sr0,
       missing codepage or helper program, or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so


and the discs are not automatically mounted. However, there appears to be nothing wrong with them: they can be read without problem on other operating systems. Moreover, I can mount the discs manually and read them fine. At no point do I see any I/O error messages in dmesg.

Output of udevadm monitor :


monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent

KERNEL[1314356104.186242] change   /devices/pci0000:00/0000:00:1f.1/host3/target3:0:0/3:0:0:0/block/sr0 (block)
UDEV  [1314356104.381819] change   /devices/pci0000:00/0000:00:1f.1/host3/target3:0:0/3:0:0:0/block/sr0 (block)
KERNEL[1314356116.180650] change   /devices/pci0000:00/0000:00:1f.1/host3/target3:0:0/3:0:0:0/block/sr0 (block)
UDEV  [1314356119.373916] change   /devices/pci0000:00/0000:00:1f.1/host3/target3:0:0/3:0:0:0/block/sr0 (block)


Output of blkid -p -o udev /dev/sr0 :


ID_FS_VERSION=Joliet\x20Extension
ID_FS_LABEL=USA_Trip_2011
ID_FS_LABEL_ENC=USA\x20Trip\x202011
ID_FS_TYPE=iso9660
ID_FS_USAGE=filesystem


Output of cd-info --dvd /dev/sr0:


cd-info version 0.82 x86_64-redhat-linux-gnu
Copyright (c) 2003, 2004, 2005, 2007, 2008 R. Bernstein
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
CD location   : /dev/sr0
CD driver name: GNU/Linux
   access mode: ioctl

Vendor                      : Optiarc 
Model                       : DVD RW AD-7590A 
Revision                    : 1.05
Hardware                                  : CD-ROM or DVD
Can eject                                 : Yes
Can close tray                            : Yes
Can disable manual eject                  : Yes
Can select juke-box disc                  : No

Can set drive speed                       : No
Can read multiple sessions (e.g. PhotoCD) : Yes
Can hard reset device                     : Yes

Reading....
  Can read Mode 2 Form 1                  : Yes
  Can read Mode 2 Form 2                  : Yes
  Can read (S)VCD (i.e. Mode 2 Form 1/2)  : Yes
  Can read C2 Errors                      : Yes
  Can read IRSC                           : Yes
  Can read Media Channel Number (or UPC)  : Yes
  Can play audio                          : Yes
  Can read CD-DA                          : Yes
  Can read CD-R                           : Yes
  Can read CD-RW                          : Yes
  Can read DVD-ROM                        : Yes

Writing....
  Can write CD-RW                         : Yes
  Can write DVD-R                         : Yes
  Can write DVD-RAM                       : Yes
  Can write DVD-RW                        : No
  Can write DVD+RW                        : No
__________________________________

Disc mode is listed as: DVD-R
CD-ROM Track List (1 - 1)
  #: MSF       LSN    Type   Green? Copy?
  1: 00:02:00  000000 data   false  no   
170: 95:59:74  431849 leadout (968 MB raw, 843 MB formatted)
__________________________________
CD Analysis Report
CD-ROM with ISO 9660 filesystem and joliet extension level 3
ISO 9660: 1554521 blocks, label `USA Trip 2011                   '
Application: K3B THE CD KREATOR (C) 1998-2010 SEBASTIAN TRUEG AND MICHAL MALEK
Preparer   : 
Publisher  : 
System     : LINUX
Volume     : USA Trip 2011
Volume Set : 


Version-Release number of selected component (if applicable):
udev-167-4.fc15.x86_64
udisks-1.0.2-4.fc15.x86_64
k3b-2.0.2-4.fc15.x86_64