Ok, I'm walking into this thing late. What's this about BlackRapid RS-4's early designs being flawed and how it has been acknowledged by the company and recently revised?
My RS-4 is two years old. I am ready to douse it with gasoline and and take a match to it as I've had a second incident with it recently. Finding this post may have me re-consider the torching idea in favour of contacting the company. Please read my story:
Four days ago I attended a major league ball game and thought I'd take my 5D Mark III along and get some shots. I instinctively attached the RS-4 because I didn't want to have any accidents during my time out. At one point during the game I decided to tighten the screw/fastener to the camera as well as the safety screw that's attached to the clip. I made it TIGHT.
After the game we decided to hit the town and do some walking and sight seeing.Typically I'll hold on to the camera while the RS-4 is around my neck just to reduce the amount of bouncing while the camera is hanging by my side. Here's the the part that gets ****'ed up. At one point of our walk I'm standing on a dock by the harbour with the camera in my hand and I'm JUST ABOUT to release the battery grip to allow the camera to hang by the strap when I see that the camera is NO LONGER ATTACHED to the strap. Now this part must be read with complete trust and belief because I s-h-i-t you not, the screw in fastener was still TIGHTLY secured in the camera *AND* the safety screw that's on the latch/clip was also fully tightened just as I had left it at the ball game.
Photo: a clip and a fastener attached together as it should be! Only detachable if the safety piece is un-screwed.

That safety screw you see on the clip/carabener - it was tight. Very tight. The fastener on the right that goes into the tripod socket - it was disconnected but still tightly secured to the camera. WTF?
You know that old magic trick, 'the magic, golden rings"? That's basically what I was looking at, but the real thing. Maybe somebody could shed some light on exactly what had happened, because what I was looking at in my hands was an impossibility - a defiance of the natural laws of the universe. If I re-attached the camera and jerked and pulled on the strap/camera I couldn't replicate that even if I gave it my damnedest.
I was pissed that my strap decided to disconnect from my camera WHILE IN MY HANDS (casual sight-seeing, NOTE: no force applied at all). I was pissed that I could have so easily let go of my 5D3+85L on the ground because of this BS. I was also pissed that there was a new chunk of black finish gouged off of my camera with signs of copper discoloration matching that of the RS-4. The camera is not even a week old and it already has a gouge on the front/bottom on thanks to my new enemy, Blackrapid.
I invite anyone to explain the seemingly supernatural phenomenon which occurred to me that day on the docks. I don't believe in ghosts or UFOs, but what I did witness was completely impossible meaning there's a part of this mystery I'm not putting my eye on.
Also note: this exact incident has happened to me once before while taking photos at of an engagement shoot.