Comment 2 for bug 279411

I've got 2.6.27-7 and I can't mount an new ext4 volume (created with $ sudo mkfs.ext4 /dev/sdb5 -L Ubuntu8.10) :

$ sudo mount /dev/sdb5 /media/Ubuntu8.10/
mount: type inconnu de système de fichiers 'ext4'

Notice that I didn't use mkfs.ext4dev that may be different