acpi_tz0 _tmp value is absurd, ignored

[JonnyAlpha]

Hi;

I have just plugged my NAS Box back into a monitor to change the idle time on my 3 x WD Caviar Green Drives (Problems in another post now seem to be resolved) however when I re-booted the NAS from my USB Device I noticed the following message keeps appearing on the screen:

acpi_tz0 _tmp value is absurd, ignored freenas

Its clearly a false message but is it a problem and how do I get rid of it?

Thanks