On Ubuntu 10.04.4, the following mysql-server packages are shown as available (apt-cache showpkg mysql-server):

5.1.63-0ubuntu0.10.04.1

5.1.41-3ubuntu12.10 

5.1.41-3ubuntu12.7 

5.1.41-3ubuntu12 

As the version numbers show, the latest is 5.1.63; the 5.1.41-3ubuntu12.10 has nothing to do with Ubuntu 12.10, but is just a numbering coincidence (notice the -12.7 and -12 versions prior to that).

Thus, an up-to-date 10.04.4 system should be running mysql-server 5.1.63. Your production server needs to be updated to 10.04.4, and then an upgrade will install 5.1.63.

• Check your /etc/apt/sources.list and make sure that the lucid-updates and lucid-security repositories are included; then run sudo apt-get update before dist-upgrade or upgrade

The current mysql-server versions available for 12.04 LTS are:

5.5.24-0ubuntu0.12.04.1

5.5.22-0ubuntu1 

And for the upcoming 12.10 Quantal:

5.5.25-0ubuntu2