>>>>> On Wed, 06 Jun 2012 10:32:35 +0200, Hiro Protagonist <s...@swisscoast.ch> 
>>>>> said:

    > i tried to run fai-setup on "ubuntu 12.04 LTS precise" 
    > (fai-server:3.4.8ubuntu2). fai-setup terminated with the following error 
    > message:

    > chroot: failed to run command `aptitude': No such file or directory

I think you've hit this bug.
https://bugs.launchpad.net/ubuntu/+source/fai/+bug/714570

-- 
regards Thomas

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