I have to be honest here, I think this post is unfairly titled against the Pat Love Harness which seems to be working as designed. You should title the post;
"Attention North Bar 2012 Users: Potential QR Danger
The large hardened end of your chicken loop is likely to get jammed in some spreader bars."
I'm not trying to be a wise-ass here either... The free end of a chicken loop, when released, should be as smooth as possible. Many CLs are slightly larger at the end, but that North one seems a bit excessive. What does the 2014 loop end look like?
Safety warnings on this forum carry a lot of weight in future product searches that people will do. Is this spreader bar really at fault?
I do think it is a good warning to bring up, though. I'll certainly double check my slingshot CL and see if there are situations where it could jam in my spreader bar.