When I start the Ubuntu software centre, it says I cannot do anything until the package catalog is repaired. However, repairing fails.
sudo apt-get -f install and found the problem to be:
mysql-server-5.5 depends on mysql-server-core-5.5 (= 5.5.24-0ubuntu0.12.04.1); however: Version of mysql-server-core-5.5 on system is 5.5.28-0ubuntu0.12.04.2.
So, the question is, how do I install that version and resolve the dependency problem?