Comment 8 for bug 767997

Don:
Your DpkgTerminalLog.gz file contains:

Setting up apport (1.20.1-0ubuntu4) ...
Installing new version of config file /etc/default/apport ...
start: Job failed to start
invoke-rc.d: initscript apport, action "start" failed.
dpkg: error processing apport (--configure):
 subprocess installed post-installation script returned error exit status 1

Are you sure you already had 1.20.1-0ubuntu5?