Hi Emilio, I still don't fully understand the problem (like, why it happens for me but not for you) but this patch solves it for me.
Andrew
--- gnome-python-desktop-2.27.3/braseromedia/bm_module.c 2009-09-01 17:38:52.000000000 +0100
+++ mine/braseromedia/bm_module.c 2009-09-15 03:36:00.000000000 +0100
@@ -32,6 +32,7 @@
PyObject *m, *d;
init_pygobject ();
+ pyg_enable_threads ();
m = Py_InitModule ("braseromedia", brasero_media_functions);
d = PyModule_GetDict (m);

