Bamboo 1.2.3 upgrade guide
Upgrading from Bamboo 1.2.x to 1.2.3
Please follow the Bamboo upgrade guide, plus:
Bamboo on Tomcat 5
If you are running Bamboo on Tomcat 5, please follow the instructions on this guide.
Upgrading from Bamboo 1.1.x or earlier
In addition to the above, please read the Bamboo 1.2 upgrade guide and the upgrade guide for every version you are skipping during the upgrade. The complete list of upgrade guides is available here.