error on console on startup?

[J.D. Bronson]

Jul 27 06:18:06 router kernel: Starting devd.
Jul 27 06:18:07 router kernel: hw.acpi.cpu.cx_lowest:
Jul 27 06:18:07 router kernel: C1
Jul 27 06:18:07 router kernel:
Jul 27 06:18:07 router kernel: sysctl:
Jul 27 06:18:07 router kernel: hw.acpi.cpu.cx_lowest
Jul 27 06:18:07 router kernel: :
Jul 27 06:18:07 router kernel: Invalid argument
Jul 27 06:18:07 router kernel: Additional TCP options:
Jul 27 06:18:07 router kernel: .

Can someone point me to what might be causing this 'invalid' argument?
This is on a Pentium3 machine...

sysctl -a | grep cx
hw.acpi.cpu.cx_lowest: C1
dev.cpu.0.cx_supported: C1/0
dev.cpu.0.cx_lowest: C1
dev.cpu.0.cx_usage: 100.00%

-JD