Hmmm this is what it says, This Mango version 1.6.0, but I did have issues with the upgrade.
I saved a copy of the root directory at the same level, as "copy of root" then over wrote the root with the new version. When I restarted it used the "copy of" directory to recreate the work directory. I then deleted the work directory again and the "copy of" directory and restarted tomcat.
I guess what you will say is that I need to reinstall