It's the playlist module, it constantly calls parse_tracklist_node() in modules/demux/playlist/xspf.c. No idea why, just 5 minutes ago I learned what xspf is. Here's the backtrace, hope this helps: (gdb) bt #0 0xb759b508 in _IO_vfprintf_internal (s=s@entry=0xb58f0da0, format=<optimized out>, format@...