root@macmini:/var/logs/apache2# apt-get -f install
Reading package lists... Done
Building dependency tree... Done
Correcting dependencies... Done
The following extra packages will be installed:
  courier-authdaemon courier-authlib xserver-xorg-core
The following NEW packages will be installed:
  courier-authlib xserver-xorg-core
The following packages will be upgraded:
  courier-authdaemon
1 upgraded, 2 newly installed, 0 to remove and 48 not upgraded.
830 not fully installed or removed.
Need to get 0B/4079kB of archives.
After unpacking 12.0MB of additional disk space will be used.
Do you want to continue [Y/n]? y
dpkg: courier-authdaemon: dependency problems, but removing anyway as you request:
 courier-imap depends on courier-authdaemon (>= 0.47); however:
  Package courier-authdaemon is to be removed.
dpkg: error processing courier-authdaemon (--remove):
 Package is in a very bad inconsistent state - you should
 reinstall it before attempting a removal.
terminate called after throwing an instance of 'std::logic_error'
  what():  basic_string::_S_construct NULL not valid
Aborted
root@macmini:/var/logs/apache2# Errors were encountered while processing:
 courier-authdaemon