Comment 10 for bug 1359564

radiotray too attempts to call "gtk.gdk.threads_init", in src/SysTray.py:185

    def run(self):
        gtk.gdk.threads_init()
        gtk.main()

Going into SysTray.py and removing the line gtk.gdk.threads_init() from the code above allows RadioTray to run perfectly on my system.