Comment 7 for bug 27588

(In reply to comment #6)
> Same problem ...
>
> sudo update-initramfs -u
>
> running the 2.6.12-10 kernel

Then you aren't completely up-to-date with dapper. That error is from using
pre-dapper udev with a dapper kernel. You need to update /etc/apt/sources.list,
and do an "apt-get dist-upgrade", and then rerun update-initramfs. This means
you wont be able to rerun breezy kernel very well (since new udev, and lack of
hotplug is not compatible with the old kernel).