I had a mystery crash and when I was checking my gear the antenna fell off right at the box, the black rot got it. That was with 72. I have seen dozens of brown out crashes with 2.4 but that tends to be a lack of battery power. I have even seen crashes caused by people forgetting to unwrap the antenna when a new RX was used. I have seen a couple of planes go down with the same problem as John, the old knee on the wire trick. Two of my planes had lost the bind somehow, not sure if that could happen in flight or not?