Comment 2 for bug 770041

This is certainly a likely location for problems, but I'm afraid I can't reproduce this myself, which is probably necessary in order for me to fix it. Could you try this:

 * Start an installation attempt as before.
 * When you reach the hostname prompt, switch to Alt-F2, enter 'nano /lib/partman/automatically_partition/25replace/choices', change 'set -e' to 'set -ex', and save and exit.
 * Switch back to Alt-F1. Continue until it hangs.
 * Switch to Alt-F2. Kill all the process IDs listed in 'ps | egrep "partman|parted"', preferably in a single 'kill' command. (The idea of this is to force the full trace to be written out to the log file.)
 * Attach the full syslog and partman logs to this bug. There are two ways to extract them: either select "Save debug logs" from the installer main menu, or else run 'anna-install openssh-client-udeb' from a shell and then use scp to copy them from /var/log/ to another system.