I broke my D string on my Tele after it sat in the cold, -10C-ish. I played an open Em, and it snapped. No what troubled me is that it snapped at the saddle. I don't know if its because I have a bur in the saddle, or because the strings didnt have enough time to adjust back to room temperature, or if playing guitar in the cold isn't feasible.

What are your guy's thoughts? I'm about to completely re-string my Tele, and I don't know if I should try and look for a burr or not.
This post may contain my opinion and/or inaccurate information.

Current Rig:
2006 PRS CE-24
Mesa/Boogie Mark V
Voltage S212 w/ V30's
Strymon Timeline
CMATMods Signa Drive
TC Electronics Corona & Hall of Fame