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);