xfce4-taskmanager 1.0.0 and the Nimbus theme of OpenSolaris

[Genghis Khan]

The graphs of Task Manager 1.0.0 looks choppy with the Nimbus theme.

Nimbus is the official theme for GNOME Desktop in Sun Solaris.
Nimbus GTK Engine http://gnome-look.org/content/show.php?content=128348

See attached screenshot.
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