[CentOS] erroneous and irritating messages

HI All,

Keep getting the following in the messages file:

Feb 28 21:24:43 hp kernel: ACPI: Unable to turn cooling device [f7d82dec] 'on'
Feb 28 21:25:13 hp last message repeated 5 times

Have hordes of these.  All fans are working fine afaikt.  Any idea how to make 
the beast stop reporting these messages?  I am running kernel 
2.6.18-53.1.13.el5 #1 SMP.

Thanks in advance,

Phil