It is true, that the "Server Config > Server" settings are not automatically replicated, right? Because if I change something on the master server, the slave server doesn't have those settings after and visa versa. Thanks again! (I am using 3.0.5.4p1, Debian Wheezy 7.5 and a clustered ISPConfig setup)
Seems as if you missed one step of the cluster guide. See this page: http://www.howtoforge.com/installin...ase-cluster-on-debian-6.0-with-ispconfig-3-p4 the last scp command is essential for the setup.