calcru: runtime went backwards from on FreeBSD 5-STABLE SMP and Non-SMP

[freebsdquestion at planetmars.org]

I am getting tons of these errors and would like to know what I can do.  I
have tried setting my kern.timecounter.hardware to TSC, i8254, ACPI-safe and
I have even disabled the ACPI which leaves me with
kern.timecounter.hardware: i8254.
 
I am using FreeBSD 5-stable  #2 with dual PIII Zeon Processors and a P4
system with HyperThreading disabled and both seem to do this.  Netwin is at
a loss and so am I.  Any help would be greatly appreciated.  
 
Aug 29 19:07:12 marvin kernel: calcru: runtime went backwards from 65601433
usec to 65601140 usec for pid 6406 (surgemail)
Aug 29 19:07:36 marvin kernel: calcru: runtime went backwards from 66161646
usec to 66160290 usec for pid 6406 (surgemail)
Aug 29 19:07:36 marvin kernel: calcru: runtime went backwards from 66161646
usec to 66161114 usec for pid 6406 (surgemail)
Aug 29 19:07:51 marvin kernel: calcru: runtime went backwards from 66479195
usec to 66478025 usec for pid 6406 (surgemail)
Aug 29 19:07:51 marvin kernel: calcru: runtime went backwards from 66479195
usec to 66478775 usec for pid 6406 (surgemail)
Aug 29 19:08:29 marvin kernel: calcru: runtime went backwards from 67277563
usec to 67276508 usec for pid 6406 (surgemail)
Aug 29 19:08:29 marvin kernel: calcru: runtime went backwards from 67277563
usec to 67277310 usec for pid 6406 (surgemail)
Aug 29 19:08:40 marvin kernel: calcru: runtime went backwards from 67457231
usec to 67455796 usec for pid 6406 (surgemail)
Aug 29 19:08:40 marvin kernel: calcru: runtime went backwards from 67457231
usec to 67456525 usec for pid 6406 (surgemail)
Aug 29 19:08:40 marvin kernel: calcru: runtime went backwards from 67457231
usec to 67457192 usec for pid 6406 (surgemail)
 
 
 
Thanks,
Ed