Upgrading Ubuntu and no longer access to my encrypted home partition

I recently upgraded my laptop to the latest Ubuntu 8. The upgrade process was easy and quick however after the reboot I was unable to access my home-directory. I have a separate partition on which /home is mounted. This partition is encrypted with cryptsetup.

When I start the cryptdisk daemon it returns an error:

/etc/init.d/cryptdisks start
* Starting remaining cryptodisks...
mount: special device /dev/mapper/cryptohome does not exist
Enter passphrase:

Checking the status with cryptdisk doesn’t show any errors:
/dev/mapper/cryptohome is active:
cipher: aes-cbc-plain
keysize: 256 bits
device: /dev/sda3
offset: 0 sectors
size: 40949685 sectors
mode: read/write

And the device is there:
ls -l /dev/mapper/
total 0
crw-rw---- 1 root root 10, 63 2008-07-12 17:20 control
brw-rw---- 1 root disk 254, 0 2008-07-12 17:47 cryptohome

Crypttab is also configured correctly:

cryptohome /dev/sda3 none vol_id

Mounting the /home partition on /dev/mapper/cryptohome (as root) returns :

mount: wrong fs type, bad option, bad superblock on /dev/mapper/cryptohome,
missing codepage or other error
In some cases useful info is found in syslog - try
dmesg | tail or so

with these errors in dmesg
[ 1966.915329] VFS: Can't find ext3 filesystem on dev dm-0

Creating new encrypted partitions (with similar settings) works like a charm. The partition worked perfectly for months before the upgrade and currently I don’t have any clue on how to access my encrypted data. Any help would be highly appreciated.

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