Would you mind letting us know how they failed? What do you mean safety releases and how did the lack of them contribute to the accidents you describe?
Yes, let's hear the details.
Ditto - I'm not of the "I don't believe you" attitude, because I do. I just want to see what I need to avoid. Pictures would help.
I have over 10,000 miles on a PB set without even noticing they're there really.