Description of problem:
lm-sensors is displaying +6727°C for k10temp-pci-00c3 sensor. I'm using standard kernel and standard packages provided by Fedora 15 x86_64 (no custom kernel modules installed).

Version-Release number of selected component (if applicable):
#uname -a
Linux mymachine.mydomain.com 2.6.40.3-0.fc15.x86_64 #1 SMP Tue Aug 16 04:10:59 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
# sensors -v
sensors version 3.3.1 with libsensors version 3.3.1

How reproducible:

#
#sensors


Steps to Reproduce:
1. install lm_sensors packages (yum install -y lm_sensors)
2. detect sensors (sensors-detect) and hit enter for all questions
3. run sensors
4. reboot and repeat step 3 doesn't change anything.
  
Actual results:
# sensors
nouveau-pci-0068
Adapter: PCI adapter
temp1:       +6727.0°C  (high = +100.0°C, crit = +110.0°C)

k10temp-pci-00c3
Adapter: PCI adapter
temp1:        +34.5°C  (high = +70.0°C)
                       (crit = +99.5°C, hyst = +94.5°C)

atk0110-acpi-0
Adapter: ACPI interface
Vcore Voltage:      +1.34 V  (min =  +0.85 V, max =  +1.60 V)
 +3.3 Voltage:      +3.34 V  (min =  +2.97 V, max =  +3.63 V)
 +5 Voltage:        +5.08 V  (min =  +4.50 V, max =  +5.50 V)
 +12 Voltage:      +11.88 V  (min = +10.20 V, max = +13.80 V)
CPU FAN Speed:     3708 RPM  (min =  200 RPM)
CHASSIS FAN Speed:    0 RPM  (min =  200 RPM)
CPU Temperature:    +44.0°C  (high = +60.0°C, crit = +95.0°C)
MB Temperature:     +35.0°C  (high = +45.0°C, crit = +75.0°C)

it8721-isa-0290
Adapter: ISA adapter
in0:          +2.86 V  (min =  +1.15 V, max =  +0.48 V)  ALARM
in1:          +2.90 V  (min =  +0.50 V, max =  +1.24 V)  ALARM
in2:          +1.34 V  (min =  +2.68 V, max =  +1.25 V)  ALARM
+3.3V:        +3.36 V  (min =  +4.90 V, max =  +3.72 V)  ALARM
in4:          +2.81 V  (min =  +1.12 V, max =  +0.08 V)  ALARM
in5:          +2.68 V  (min =  +1.55 V, max =  +2.75 V)
in6:          +2.68 V  (min =  +0.36 V, max =  +2.58 V)  ALARM
3VSB:         +4.20 V  (min =  +4.73 V, max =  +5.35 V)  ALARM
Vbat:         +3.38 V
fan1:        3708 RPM  (min =   14 RPM)
fan2:           0 RPM  (min =   23 RPM)  ALARM
fan3:           0 RPM  (min =   16 RPM)  ALARM
temp1:        +44.0°C  (low  = +84.0°C, high = -23.0°C)  ALARM  sensor = thermistor
temp2:        +35.0°C  (low  = +51.0°C, high = -51.0°C)  ALARM  sensor = thermistor
temp3:       -128.0°C  (low  =  -4.0°C, high = +115.0°C)  sensor = disabled

Expected results:
Well, something like
# sensors
nouveau-pci-0068
Adapter: PCI adapter
temp1:       +45.0°C  (high = +100.0°C, crit = +110.0°C)
...
...

Additional info: