Version:           4.3.1-3.4-i586 (using KDE 4.3.1)
OS:                Linux
Installed from:    openSUSE RPMs

When some sensor names that are printed by ...> sensors are placed in a superkaramba theme, the result is a blank.  sensors on my machine yields:

jdcook@linux-72au:~> sensors
atk0110-acpi-0
Adapter: ACPI interface
Vcore Voltage:      +1.07 V  (min =  +0.85 V, max =  +1.60 V)
 +3.3 Voltage:      +3.22 V  (min =  +2.97 V, max =  +3.63 V)
 +5 Voltage:        +4.87 V  (min =  +4.50 V, max =  +5.50 V)
 +12 Voltage:      +12.15 V  (min = +10.20 V, max = +13.80 V)
SB Voltage:         +1.04 V  (min =  +0.90 V, max =  +1.29 V)
SB2 Voltage:        +1.50 V  (min =  +1.22 V, max =  +1.82 V)
FSBT Voltage:       +1.15 V  (min =  +1.00 V, max =  +1.48 V)
DRAM Voltage:       +2.35 V  (min =  +1.50 V, max =  +2.28 V)
DRAM Ref Voltage:   +1.17 V  (min =  +0.75 V, max =  +1.14 V)
NB Voltage:         +1.33 V  (min =  +1.04 V, max =  +1.56 V)
CPU FAN Speed:     2109 RPM  (min =  600 RPM)
CHASSIS1 FAN Speed:3068 RPM  (min =  600 RPM)
CHASSIS2 FAN Speed:   0 RPM  (min =  600 RPM)
CHASSIS3 FAN Speed:   0 RPM  (min = 1800 RPM)
PWR FAN Speed:        0 RPM  (min = 1800 RPM)
OPT_Fan1 FAN Speed:1454 RPM  (min =  800 RPM)
OPT_Fan2 FAN Speed:1622 RPM  (min =  800 RPM)
OPT_Fan3 FAN Speed:1506 RPM  (min =  800 RPM)
CPU Temperature:    +36.0°C  (high = +35.0°C, crit = +90.0°C)
MB Temperature:     +42.0°C  (high = +30.0°C, crit = +90.0°C)
NB Temperature:     +41.0°C  (high = +45.0°C, crit = +95.0°C)
SB Temperature:     +47.0°C  (high = +45.0°C, crit = +95.0°C)
OPT1 Temperature:    +0.0°C  (high = +45.0°C, crit = +95.0°C)
OPT2 Temperature:    +0.0°C  (high = +45.0°C, crit = +95.0°C)
OPT3 Temperature:    +0.0°C  (high = +45.0°C, crit = +95.0°C)

If I use:

text x=105 y=665 sensor=sensor type="CPU FAN Speed" format="%v rpm"

No Problem, fan speed appears.

If I use:

text x=105 y=680 sensor=sensor type="CHASSIS1 FAN Speed" format="%v rpm"

No speed is shown, even though sensors shows 3068 rpm!

All the usual tricks about substituting names, etc. all point to an inability to find "CHASSIS1 FAN Speed".  This is a problem for most fan speeds (OPT_Fan1 FAN Speed, etc.), but not for the temps printed by sensors.  Also, ksensors can see (and display as a meter) ALL the sensors.  It is just superkaramba that has the problem.

MOBO is an Asus Maximus Formula (SE)