I finally managed to witness our collector core today. #0 0x8052918 in free () (gdb) bt #0 0x8052918 in free () #1 0x58 in ?? () #2 0x804f632 in free () #3 0x805272c in free () #4 0x804ebe6 in free () #5 0x804e32b in free () #6 0x804ad6f in free () #7 0x804a14e in free () However, when I run argus from gdb it doesn't die off. Argh!