chris@roa:~$ sudo apt-get -o Debug::pkgProblemResolver=yes dist-upgrade libapache2-mod-php5   apache2-mpm-prefork apache2-threaded-dev apache2-utils apache2.2-common libaprutil1 libaprutil1-dev
Reading package lists... Done
Building dependency tree... Done
Calculating upgrade... Starting
Starting 2
Investigating apache2-mpm-prefork
Package apache2-mpm-prefork has broken dep on apache2.2-common
  Considering apache2.2-common 11 as a solution to apache2-mpm-prefork 10002
  Added apache2.2-common to the remove list
  Fixing apache2-mpm-prefork via keep of apache2.2-common
 Try to Re-Instate apache2.2-common
Re-Instated apache2.2-common (1 vs 1)
Investigating apache2-mpm-prefork
Package apache2-mpm-prefork has broken dep on apache2.2-common
  Considering apache2.2-common 11 as a solution to apache2-mpm-prefork 10002
  Added apache2.2-common to the remove list
  Fixing apache2-mpm-prefork via keep of apache2.2-common
Investigating apache2-threaded-dev
Package apache2-threaded-dev has broken dep on apache2.2-common
  Considering apache2.2-common 11 as a solution to apache2-threaded-dev 0
  Holding Back apache2-threaded-dev rather than change apache2.2-common
 Try to Re-Instate apache2-threaded-dev
Done
Done
The following packages have been kept back:
  apache2-mpm-prefork apache2-threaded-dev apache2-utils apache2.2-common libaprutil1 libaprutil1-dev
0 upgraded, 0 newly installed, 0 to remove and 6 not upgraded.