Well, there is still something broken:

tw@x300:~$ sudo apt-get install -f
Reading package lists... Done
Building dependency tree       
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
1 not fully installed or removed.
Need to get 436kB of archives.
After this operation, 0B of additional disk space will be used.
Get:1 http://de.archive.ubuntu.com jaunty/universe pdns-recursor 3.1.7-2 [436kB]
Fetched 436kB in 0s (609kB/s)         
(Reading database ... 256553 files and directories currently installed.)
Preparing to replace pdns-recursor 3.1.7-2 (using .../pdns-recursor_3.1.7-2_i386.deb) ...
 * Stopping PowerDNS recursor pdns-recursor                                                                                      invoke-rc.d: initscript pdns-recursor, action "stop" failed.
dpkg: warning - old pre-removal script returned error exit status 1
dpkg - trying script from the new package instead ...
 * Stopping PowerDNS recursor pdns-recursor                                                                                      invoke-rc.d: initscript pdns-recursor, action "stop" failed.
dpkg: error processing /var/cache/apt/archives/pdns-recursor_3.1.7-2_i386.deb (--unpack):
 subprocess new pre-removal script returned error exit status 1
postinst called with unknown argument `abort-upgrade'
dpkg: error while cleaning up:
 subprocess post-installation script returned error exit status 1
Errors were encountered while processing:
 /var/cache/apt/archives/pdns-recursor_3.1.7-2_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)


tw@x300:~$ sudo apt-get install pdns-recursor
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages will be upgraded:
  pdns-recursor
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
Need to get 0B/446kB of archives.
After this operation, 16.4kB of additional disk space will be used.
(Reading database ... 256553 files and directories currently installed.)
Preparing to replace pdns-recursor 3.1.7-2 (using .../pdns-recursor_3.1.7-2ubuntu0.1_i386.deb) ...
 * Stopping PowerDNS recursor pdns-recursor                                                                                      invoke-rc.d: initscript pdns-recursor, action "stop" failed.
dpkg: warning - old pre-removal script returned error exit status 1
dpkg - trying script from the new package instead ...
 * Stopping PowerDNS recursor pdns-recursor                                                                                      invoke-rc.d: initscript pdns-recursor, action "stop" failed.
dpkg: error processing /var/cache/apt/archives/pdns-recursor_3.1.7-2ubuntu0.1_i386.deb (--unpack):
 subprocess new pre-removal script returned error exit status 1
postinst called with unknown argument `abort-upgrade'
dpkg: error while cleaning up:
 subprocess post-installation script returned error exit status 1
Errors were encountered while processing:
 /var/cache/apt/archives/pdns-recursor_3.1.7-2ubuntu0.1_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)


tw@x300:~$ sudo apt-get upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages will be upgraded:
  pdns-recursor
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
Need to get 0B/446kB of archives.
After this operation, 16.4kB of additional disk space will be used.
Do you want to continue [Y/n]? 
(Reading database ... 256553 files and directories currently installed.)
Preparing to replace pdns-recursor 3.1.7-2 (using .../pdns-recursor_3.1.7-2ubuntu0.1_i386.deb) ...
 * Stopping PowerDNS recursor pdns-recursor                                                                                      invoke-rc.d: initscript pdns-recursor, action "stop" failed.
dpkg: warning - old pre-removal script returned error exit status 1
dpkg - trying script from the new package instead ...
 * Stopping PowerDNS recursor pdns-recursor                                                                                      invoke-rc.d: initscript pdns-recursor, action "stop" failed.
dpkg: error processing /var/cache/apt/archives/pdns-recursor_3.1.7-2ubuntu0.1_i386.deb (--unpack):
 subprocess new pre-removal script returned error exit status 1
postinst called with unknown argument `abort-upgrade'
dpkg: error while cleaning up:
 subprocess post-installation script returned error exit status 1
Errors were encountered while processing:
 /var/cache/apt/archives/pdns-recursor_3.1.7-2ubuntu0.1_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)