I've now busted two wiring harnesses for the Cateyes I have on two different bikes. On one, the plastic retaining tab on the computer mount snapped off when I got back after a ride in ~15 degree weather, and on the other bike, the rear wheel sensor for speed (Astrale) cracked off when I bumped into it while removing the back wheel to check something.
How cold does it get before this starts happening?? I didn't even think of the issue until they both got damaged within a two day window.
Have one replacement in hand (that one I've had for a couple of years), but the other one I'm tempted to write to Cateye about, as it's been on the beater for only a month or two with not that much mileage and no abuse.