I've read that thread and I have no idea what issue they are suffering from. All I can say is that my Ultra-Gauge has been hooked up to me Focus since mid-August and has been flawless. And yes, this inculdes having the vehicle sit for multiple days without being driven.
1/15/2014.... Back in the shop baby! For those keeping score at home, this is day number 86!
2012 Ingot Silver Focus SE 5spd w/ Sport and Winter pkgs.