Yeah, this clearly is an issue of the squeeze->wheezy upgrade.

Everyone stumbling upon this issue should use a base.tgz based on >=wheezy (see
http://grml.org/grml-live/#create-a-base-tgz) when using >=Debian/wheezy instead
of using a squeeze chroot.

I couldn't find a way how to get rid of is this issue and don't want to waste
any more time with it, so marking this one as won't fix.

This seems to be related to the base files used on daily.grml.org (buildhost),
which involves the squeeze->wheezy upgrade then, whereas on the new Jenkins host
we don't use any basefiles.

This seems to be reproducible *only* with ISOs generated on daily.grml.org (AKA
current buildhost), nowhere else.

Present in at least grml64_testing_20120114.iso (and therefore might hit as in
our stable release as well then):

| INIT: version 2.88 booting
| mount: according to mtab, tmpfs is already mounted on /run
|
| mount: according to mtab, proc is already mounted on /proc
|
| mount: according to mtab, sysfs is already mounted on /sys

I don't know why this happens now...