The doctype for the facesconfigs in richfaces-impl and richfaces-ui are pointing to http://java.sun.com/dtd/web-facesconfig_1_1.dtd. Every time my programming environment wants to validate the facesconfig it needs a connection to the internet to get the dtd file.
I would like to suggest to move the dtd file into the META-INF folder and change the doctype to:
<!DOCTYPE faces-config SYSTEM "web-facesconfig_1_1.dtd">
This way no internet connection would be required to validate the facesconfigs.