Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 libldap-2.4-2 : Breaks: libldap-2.4-2:i386 (!= 2.4.28-1.1ubuntu4.3) but 2.4.28-1.1ubuntu4.4 is to be installed
 libldap-2.4-2:i386 : Breaks: libldap-2.4-2 (!= 2.4.28-1.1ubuntu4.4) but 2.4.28-1.1ubuntu4.3 is to be installed
 ppa-purge : Depends: aptitude but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).