During an installation test over SSH (using the network-console
component) the sshd daemon failed to start, breaking the installation.
The log showed the error "sshd re-exec requires execution with an
absolute path".
I tried starting the deamon from the shell and got the same error.
Starting the daemon with /usr/sbin/sshd succeeded.
I'm not sure if this is a bug or intended new behavior. This report
submitted after consulting with Colin Watson.
For now we have set the absolute path in d-i to work around the problem.