.
Thread 1 (process 4579):
#0  0xb7793ae8 in g_type_check_instance_cast ()
   from /usr/lib/libgobject-2.0.so.0
#1  0xb62c4dec in ?? () from /usr/lib/libwnck-1.so.22
#2  0xb62c57a8 in ?? () from /usr/lib/libwnck-1.so.22
#3  0xb76e8bf1 in ?? () from /usr/lib/libglib-2.0.so.0
#4  0xb76eaaf8 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#5  0xb76ee05b in ?? () from /usr/lib/libglib-2.0.so.0
#6  0xb76ee52a in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#7  0xb7b7e799 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#8  0x08062f9c in main ()