Comment 8 for bug 102921

I took a video of the problem with Istanbul.
At 7-12 seconds I move the mouse around inside the network graph to show that moving the mouse inside the graph is not sufficient to create the problem.
At 15-25 seconds I move the mouse in and out of the graph area a couple times to show the reproduction of the problem.
At 25-32 seconds I move the mouse over the other graphs in gnome-system-monitor applet to show that popping the mouse over any graph will cause the network graph to go down.
At 35-40 seconds, a demonstration that tooltips in other Gnome Panel icons don't reproduce, nor does partially covering the graphs with a tooltip.
Finally, at 40-46 seconds I move the mouse in and out of the graph area repeatedly (though it's hard to tell in the video), to show that this can create a long valley in the graph.
Note that System Monitor is running below to show what the graphs should approximately look like. I tried screencasting just the relevant portion of my screen, but Istanbul's area recording isn't working at the moment, so you get the entire desktop instead.