I have just built a workstation on Asus P8B WS motherboard, with Intel chipset C206 and Xeon E3-1280 processor.
Not only does not Speccy recognize Xeon (says Core i7), but reports temperatures significantly different to those detected by utility provided with motherboard. See attached screen capture.
I've got the same problem (and a P67 chipset, like Caliban). Mine is reading ~124C right after booting up, while the BIOS and Asus' AI Suite report ~26C.
I installed Speccy 1.13.276 on my new system with a BiostarTA75M motherboard, XP3 32 bit,. It is a wonderful tool but the temperature readings for CPU, System, and Video are in the 30s and 40s F which of course is impossible. The Cpu fan speed shows 13 rpm and that is way wrong. The 12V and 5V readings are also wrong. These readings are OK in BIOS. I would really like to have these features working in Speccy.
Update
I just updated to Speccy 1.14.288 and it is no better, maybe worse. Temperature readings are way below ambient, fan speed is way below actual.