dot - graphviz version 2.26.3 (on Ubuntu 11.10) does not recognize arcs from/to clusters

The Undirected Graph Clusters example at fdpclust produces a disconnected graph instead of the documented output. Apparently, cluster names in arcs like "clusterC -- clusterB" are assumed to be new nodes. I had this problem in other dot files as well.

node multiline support

interactive viewer for graphs with multi line support xdot-multi-line with this feature you can have nodes with more than 1 line of text and when you click in one line you will obtain the associate text. http://code.google.com/p/xdot-multi-line/

dot - graphviz version 2.26.3

At present, fdp is the only Graphviz layout program that recognizes edges between clusters. If you run 2.26 fdp on the graph, you will get the expected output.