Sorry, here's some additional info.
I use studio-flashes, i connect the cord from my lenses or camera to my pocketwizard unit, which almost never mis-fire if its connected to a hot shoe. The PW's connections are fine as well, because I mostly connect them to the flashes (using a different cord and plug) without incident. I have 3 pocketwizards and it does happen with all of them.
So, the culprit seem do be the lens connection or the cable.
Though, I have the same issue with the 80 mm lens and my 160cb lense on my 'blad, and the same issue with the Rolleiflex, which, IMO, narrows it down to the cable.
- It does work, but it's not reliable....and when you have 12 shots and 4 are blank, it kind of piss you off.
I'm thinking about removing the back and wind up the Hasselblad again if a misfire happens, but you can't make multiple exposures on a Rolleiflex.
The cable is only 10-12 inches long, straight type, not the curled ones.
New out of the box. I have 3-4 of them and bought them as accessories to my PW's at B&H, so they are a little more "high end" I suppose.
The cords are only meant to be a connector for my pockwetwizards, never from camera to a flash.
Normally I would use a PW directly in my hot-shoe, this always works on my Mamiya rz II without incident.
It really blows my mind, that such a proprietary system like the Hasselblad, which use a special bayonet-mount for filters, among other things, decided to KEEP the worst design in the history of photography, namely the "pc-connection".
It also blows my mind that someone still hasn't been able to design a system, which clamps the cord/plug when it's connected, after all, you put the plug into a hole, a mechanism, which then widen a rubber/plastic seal inside the connection-hole, should help stabilize it and help keep it connected.......I am looking for something like this.
Nikon has indeed a nice solution, but it demands that the connection is threaded, I am not really that keen on paying up for a custom job on this.
I have used everything from the el-cheapo's to more branded types.
I'll look into those fixing-tools, although my cords seemed to connect ok to the lenses and to the rolleiflex, at is was a slight resistance while connecting them and that they "stick" a little when connected, the plugs on the cords themselves doesn't seem to be crooked or bent.