I have MasterTickets installed and working well. I wanted depgraphs, so following the wiki installed GraphVizPlugin, which I got working. But reading the source, I am thinking that MasterTickets uses graphviz directly and doesn't use the GraphVizPlugin. If someone can confirm I will fix the wiki.
Also, I see there is this plugin, which doesn't explain what it does that the MasterTickets builtin support does not. http://trac-hacks.org/wiki/TracTicketDepgraphPlugin I'm guessing that the added feature is the wiki-embeddable graph of everything.
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