ubuntu 12.10 precise pangolin breaks my redmine and tomcat7 installation

My redmine installation was broken when I installed Precise pangolin. The home screen was ok, but I has errors when navigating on the app. I didn’t search much but found easyli the solution when I tried to install a package. I had errors when running sudo apt-get install …. These errors where about the command rake db:migrate and the tomcat file tomcat-users.xml.

So the action about ruby was easy :

sudo gem install --remote rake

For tomcat 7, I had a previous manual installation on ubuntu 11. As tomcat 7 is embedded with precise pangolin, I just had to copy the file missing fomr my previous manual installation :

sudo cp /opt/tomcat7/conf/tomcat-users.xml /etc/tomcat7