VirtualBox hit warning on `calibrate_APIC_clock`

Environment:
Host:   Fedora 11. XFCE 2.6.30.10-105.2.23.fc11.i586
Vb Version: VirtualBox 3.2.12
Guest: Oracle OEL5.5 2.6.18-194.26.1.0.1.el5

Hit problem:(refer to bug562006)

WARNING calibrate_APIC_clock: the APIC timer calibration may be wrong

fix/workaround:

add follow postfix to grub boot option:

update: Thu Dec 16 17:26:41 CST 2010
Description : the above mentioned workaround seems cannt workaround,
fix applied from bug562006 has provided,
but I checked the changelog of kernel, which already merged this fix:

* Mon Feb 15 2010 Jarod Wilson <jarod@redhat.com> [2.6.18-188.el5]
– [misc] fix APIC and TSC reads for guests (Prarit Bhargava) [562006]

to find a new w/k
update: Fri Dec 17 14:17:07 CST 2010
Still doesnt work when re-build a kernel which has merged the fix.562006.
giveup and ingore the warning.

——————Sceenshot Before fix——————

——————Sceenshot after fix applied———–