Where I've seen this sort of thing (and I'm sure it's buried in the dupes) is on postfix package installs. Perhaps it would be worth while to examine it's use of debconf and see if it's doing anything troubling/likely to cause such problems. That might lead to a hint for the more general case.
Where I've seen this sort of thing (and I'm sure it's buried in the dupes) is on postfix package installs. Perhaps it would be worth while to examine it's use of debconf and see if it's doing anything troubling/likely to cause such problems. That might lead to a hint for the more general case.