I've installed the extension described here:
http://meta.wikimedia.org/wiki/GraphViz
And it does work. However, the diagrams aren't nicely antialiased (i.e. curves smooth -- no jagged lines) like those in the second mediawiki samples site here:
http://www.islandseeds.org/wiki/Test:Graphviz
Does anyone know how to get nicely antialiasing diagrams like this from the GraphViz extension?
Thanks,
Randall