Comment 21 for bug 190291

And here's another sanity check to try. Put 2 iterations of the GThread initialisation code. i.e.

 if (!g_thread_supported ())
 {
  g_thread_init (NULL);
 }
 if (!g_thread_supported ())
 {
  g_thread_init (NULL);
 }
 gdk_threads_init();

This works fine for me. If this fails for you then we know that g_thread_supported() is not doing its job.

BTW, removing both of them causes a nice runtime error on my system.

Thanks for all your help. It's nice dealing with people that know their stuff and aren't afraid to get their fingers dirty. I really hope that we can get this working for Fedora.