clock works slowly when I change CPU speed

[Nate Lawson]

Between Aug 2 and 9, there were no significant changes to ACPI.  I
imported the userland tools, added tunable access to an existing variable,
and increased the default sleep delay from 0 to 5.  The last one is the
only functional change and can be undone by doing:
  sysctl hw.acpi.sleep_delay=0

Please try with an Aug. 2 kernel but load the latest acpi.ko to be sure
this is not an acpi problem.

-Nate