Again, I think the core problem the problem is not intrinsically with
rsyslogd.

While I agree that there ought to be a flooding failsafe in rsyslogd,
the base problem here is the CPU temperature sensors algorithm in the
kernel and the reporting of errant messages.

I earlier thought this was due to lm-sensors/libsensors3/libsensors4,
but those aren't loaded at the initial install.

HAL now does those functions, so it seems to me that a module such as
hal-addon-acpi is the culprit for the aberrant message stream.

The root problem is the enforced checking of motherboard/CPU sensors.
Because there are is many motherboards/CPUs that do not have sensor
drivers in Linux for their fan speeds and temperature sensors, the
sensor checking algorithm must be optional.

It is not, in the current kernel, and instead of a single message that
sensors are unable to be polled (due to lack of drivers), the kernel
module instead returns repeated "temperature out of range" messages.
This is the bug.

Jaunty did not rely on HAL in this manner (and Jaunty did not mandate
CPU sensor monitoring).

This serious bug is giving Linux (and by extension Ubuntu) a big black
eye with the Karmic release. This should be upgraded to urgent.

-- 
/var/log fills up with "all normal" messages @ about 575/sec fill up the 
available space
https://bugs.launchpad.net/bugs/453444
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