Black Diamond has also recalled some of their nylon runners. It seems like this is an error which will be obvious upon inspection.
https://warranty.bdel.com/RunnerRecall/Landing
http://www.cpsc.gov/en/Recalls/2016/Bla ... n-Runners/
https://warranty.bdel.com/RunnerRecall/Landing
http://www.cpsc.gov/en/Recalls/2016/Bla ... n-Runners/