I just got a new pugsley white "complete" bike and went for a first ride tonight. It was about -15F and fairly often when I would press the rear derailleur thumb shifter it would have no resistance as if the cable wasn't attached at all...a few presses and then there would be pressure and I could get it to change gears. My other mtn bike with SRAM7 (?) levers/derailleurs has no such problem. I'll be talking with the lbs today but wondered what your thoughts were. GoreTex cables? A different set of levers or derailleur? The levers are some type of Deore. I got one of these for myself and one for my wife (present, actually, from our daughter and husband) and want to get this figured out before it gets colder...We were out riding at -25F the other day with no shifting problems on our other bikes....