Stylesheet Only Works Partially After Clear

["Jacob M. H. Smith" <jacob.m.h.smith AT gmail.com>]

Hello.

First of all, I want to say that I've been playing around with GraphStream 
for a bit now and I very much like it. Keep up the great work. I'm also very 
grateful for the help I have received on this mailing list.

As for my question, I have noticed that calling the clear() method on a graph 
renders certain parts of the stylesheet I assign to it afterwards ineffective.

Here's an example. The background color of the graph is only set correctly if 
I comment out the line that clears the graph. Strangely, the color of the 
nodes does not seem to be affected. What am I missing here?

/* ======================================================== */
Graph graph = new SingleGraph("graph");
graph.display();
graph.clear(); // comment out to make the background red

graph.addAttribute("ui.quality");
graph.addAttribute("ui.antialias");
graph.addAttribute("ui.stylesheet",
    "graph { fill-color: red; } node { fill-color: green; }");

Generator gen = new BarabasiAlbertGenerator();
gen.addSink(graph);
gen.begin();
for (int i = 0; i < 100; i++) {
    gen.nextEvents();
}
gen.end();
/* ======================================================== */

Thank you.

Best regards,
Jacob