[Kubuntu] Sony DCR-DVDXXX doesn't mount anymore...

I'm using Kubuntu. I used to just plug my Sony DCR-DVD405 camera and the device would mount automatically. This worked perfectly while I was using Edgy, and stopped working after some Edgy update. A few days ago I updated to Feisty, but the problem persists. I tried a fresh Feisty installation and it doesn't work either. I tried the Edgy Live DVD, and it DOES work.

Currently, when I plug the device, dmesg reports:

[17180063.068000] usb 5-2: new high speed USB device using ehci_hcd and address 3
[17180063.212000] usb 5-2: configuration #1 chosen from 1 choice
[17180063.328000] usbcore: registered new driver libusual
[17180063.372000] Initializing USB Mass Storage driver...
[17180063.372000] scsi2 : SCSI emulation for USB Mass Storage devices
[17180063.372000] usb-storage: device found at 3
[17180063.372000] usb-storage: waiting for device to settle before scanning
[17180063.372000] usbcore: registered new driver usb-storage
[17180063.372000] USB Mass Storage support registered.
[17180068.376000] usb-storage: device scan complete
[17180068.380000] Vendor: SONY Model: DDX-C1002 Rev: R1.0
[17180068.380000] Type: CD-ROM ANSI SCSI revision: 00
[17180068.384000] 2:0:0:0: Attached scsi generic sg2 type 5
[17180068.468000] sr0: scsi3-mmc drive: 32x/32x tray
[17180068.472000] sr 2:0:0:0: Attached scsi CD-ROM sr0

But the device is not mounted. At least it doesn't show up in /etc/mtab.
When I do it with the Edgy Live DVD Kubuntu, the output is the same, but this lines shows at the end:

[17179772.564000] UDF-fs INFO UDF 0.9.8.1 (2004/29/09) Mounting volume 'SONY_MOBILE', timestamp 2007/02/15 20:18 (1000)

And I can access the MiniDVD contents with no problems. In this case, this line shows up in /etc/mtab:

/dev/scd0 on /media/dvdrecorder type udf (ro,nosuid,nodev,uid=999,gid=999,umask=000,iocharset=utf8)

In Feisty, when I try to mount the device (which doesn't automount), I get the following output:

neoakiraz@fcksys:~$ sudo mount -t udf /dev/scd0 /media/sony
mount: block device /dev/scd0 is write-protected, mounting read-only
mount: wrong fs type, bad option, bad superblock on /dev/scd0,
       missing codepage or other error
       In some cases useful info is found in syslog - try
       dmesg | tail or so

And dmesg reports:

[ 937.778686] attempt to access beyond end of device
[ 937.778696] sr0: rw=0, want=68, limit=4
[ 937.805024] attempt to access beyond end of device
[ 937.805033] sr0: rw=0, want=2770236, limit=4
[ 937.805231] attempt to access beyond end of device
[ 937.805236] sr0: rw=0, want=2769212, limit=4
[ 937.805241] attempt to access beyond end of device
[ 937.805244] sr0: rw=0, want=2768988, limit=4
[ 937.805249] attempt to access beyond end of device
[ 937.805252] sr0: rw=0, want=2770228, limit=4
[ 937.805257] attempt to access beyond end of device
[ 937.805259] sr0: rw=0, want=2769204, limit=4
[ 937.805264] attempt to access beyond end of device
[ 937.805267] sr0: rw=0, want=2768980, limit=4
[ 937.805271] attempt to access beyond end of device
[ 937.805274] sr0: rw=0, want=2769636, limit=4
[ 937.805279] attempt to access beyond end of device
[ 937.805281] sr0: rw=0, want=2768612, limit=4
[ 937.805286] attempt to access beyond end of device
[ 937.805289] sr0: rw=0, want=2768388, limit=4
[ 937.805293] attempt to access beyond end of device
[ 937.805296] sr0: rw=0, want=2769628, limit=4
[ 937.805300] attempt to access beyond end of device
[ 937.805303] sr0: rw=0, want=2768604, limit=4
[ 937.805307] attempt to access beyond end of device
[ 937.805310] sr0: rw=0, want=2768380, limit=4
[ 937.805316] attempt to access beyond end of device
[ 937.805318] sr0: rw=0, want=2273040, limit=4
[ 937.805323] attempt to access beyond end of device
[ 937.805326] sr0: rw=0, want=2272016, limit=4
[ 937.805331] attempt to access beyond end of device
[ 937.805333] sr0: rw=0, want=2271792, limit=4
[ 937.805338] attempt to access beyond end of device
[ 937.805340] sr0: rw=0, want=2273032, limit=4
[ 937.805345] attempt to access beyond end of device
[ 937.805347] sr0: rw=0, want=2272008, limit=4
[ 937.805352] attempt to access beyond end of device
[ 937.805354] sr0: rw=0, want=2271784, limit=4
[ 937.805359] attempt to access beyond end of device
[ 937.805362] sr0: rw=0, want=2272440, limit=4
[ 937.805367] attempt to access beyond end of device
[ 937.805370] sr0: rw=0, want=2271416, limit=4
[ 937.805377] attempt to access beyond end of device
[ 937.805380] sr0: rw=0, want=2271192, limit=4
[ 937.805385] attempt to access beyond end of device
[ 937.805387] sr0: rw=0, want=2272432, limit=4
[ 937.805392] attempt to access beyond end of device
[ 937.805395] sr0: rw=0, want=2271408, limit=4
[ 937.805399] attempt to access beyond end of device
[ 937.805402] sr0: rw=0, want=2271184, limit=4
[ 937.805407] attempt to access beyond end of device
[ 937.805409] sr0: rw=0, want=1252, limit=4
[ 937.805415] attempt to access beyond end of device
[ 937.805417] sr0: rw=0, want=1028, limit=4
[ 937.805420] UDF-fs: No partition found (1)

The media I'm using is perfectly good, it is read from Windows XP, and as I said, from a fresh Kubuntu Edgy (Live DVD).
I got help in KubuntuForums, in this thread: http://kubuntuforums.net/forums/index.php?topic=3083580.0, just in case you want to see what's going on in detail. They concluded this may be a bug related to libATA, but I'm not very experienced in Linux, so I really don't know. Thanks in advance,

Bruno