Comment 2 for bug 212566

I see this as well, backtrace:
#0 0x00007f8173344423 in pthread_mutex_lock () from /lib/libpthread.so.0
#1 0x0000000000422379 in ?? ()
#2 0x00000000004128eb in xmms_object_emit ()
#3 0x000000000041320f in xmms_object_emit_f ()
#4 0x000000000041c5ba in xmms_collection_changed_msg_send ()
#5 0x000000000041b80d in xmms_playlist_changed_msg_send ()
#6 0x000000000041a761 in xmms_playlist_add_entry_unlocked ()
#7 0x000000000041a6b0 in xmms_playlist_add_entry ()
#8 0x0000000000446d53 in ?? ()
#9 0x0000000000447238 in xmms_medialib_add_recursive ()
#10 0x000000000041a539 in ?? ()
#11 0x00000000004189b7 in ?? ()
#12 0x000000000041330f in xmms_object_cmd_call ()
#13 0x000000000042132a in ?? ()
#14 0x00000000004216a5 in ?? ()
#15 0x00007f817400f262 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#16 0x00007f8174012516 in ?? () from /usr/lib/libglib-2.0.so.0
#17 0x00007f81740127d7 in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#18 0x00000000004218cf in ?? ()
#19 0x00007f8174035054 in ?? () from /usr/lib/libglib-2.0.so.0
#20 0x00007f81733423f7 in start_thread () from /lib/libpthread.so.0
#21 0x00007f81730b1b2d in clone () from /lib/libc.so.6
#22 0x0000000000000000 in ?? ()