High CPU usage by wnck-applet after updating

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Issue

wnck-applet is generating high CPU usage when being run from Xvnc.
High CPU load began after updates, which included an update to the librsvg2 package.
The gnome-panel window list has has disappeared and librsvg2 messages show in the message logs.

Environment

Red Hat Enterprise Linux 6.5
Gnome Graphical Environment
Xvnc host

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