calcru: runtime went backwards

[J. W. Ballantine]

I running 6-RELEASE as a guest under vmware 5.5 and I'm having
problems with the clock going backwards.  I'm getting the message (sample):

calcru: runtime went backwards from 10542602 usec to 10542600 usec for pid 
13924
 (vmware-guestd)
calcru: runtime went backwards from 11589627 usec to 11589623 usec for pid 
13924
 (vmware-guestd)
calcru: runtime went backwards from 11743728 usec to 11743726 usec for pid 
13924
 (vmware-guestd)
calcru: runtime went backwards from 12550703 usec to 12550699 usec for pid 
13924
 (vmware-guestd)
calcru: runtime went backwards from 12601970 usec to 12601968 usec for pid 
13924
 (vmware-guestd)
calcru: runtime went backwards from 13571027 usec to 13571024 usec for pid 
13924
 (vmware-guestd)
calcru: runtime went backwards from 13571027 usec to 13571024 usec for pid 
13924
 (vmware-guestd)
calcru: runtime went backwards from 13731304 usec to 13731302 usec for pid 
13924
 (vmware-guestd)
calcru: runtime went backwards from 15674182 usec to 15674180 usec for pid 
13924
 (vmware-guestd)

Is this bsd or vmware related, and any way to fix it?

Thanks

Jim Ballantine