I installed Mono from the installer, but some applications now fail to work?
When you install Mono with the installer, the new Mono will take precedence over your system Mono. Lets call these MonoNew and MonoSystem. The problem is typically that applications depend on assemblies installed in the system GAC. This is usually located in /usr/lib/mono/gac. MonoNew is typically installed into a user’s home directory, for example /home/bob/mono-1.2.6.