This might be little out of topic.
My Celeron 366/550 (socket 370, default voltage with Golden Orb) have temperture 19C. The weird thing is case temperture is around 27C idle. Is possible CPU temperture is lower than case temperture? I am sure my thermistor is right on the core of my CPU. I am using slocket which have a small hole for me to put thermistor through to my CPU core. It happen to my old Pentium II 450 with BH6 board too.
BTW, I am using Abit BE6. I don't think it's board problem or BIOS issue. This problem is bothering me when I saw everybody's temperture is around 32C. I think there is something wrong some where.