GEOM: ad10s1: geometry does not match label (255h,63s != 16h,63s).

Since I switched recently my lab's box from FreeBSD 7.1 to FreeBSD 
8.0-CURRENT/amd64 SMP, I get this weird message:

GEOM: ad10s1: geometry does not match label (255h,63s != 16h,63s).
GEOM: ad10s2: geometry does not match label (255h,63s != 16h,63s).

This is the device identiying string:

ad10: 238475MB <Hitachi HDT725025VLA380 V5DOA52A> at ata5-master SATA300
ad12: 610480MB <SAMSUNG HD642JJ 1AA01109> at ata6-master SATA300
GEOM: ad10s1: geometry does not match label (255h,63s != 16h,63s).
GEOM: ad10s2: geometry does not match label (255h,63s != 16h,63s).
ad14: 476940MB <SAMSUNG HD501LJ CR100-11> at ata7-master SATA300
ad16: 381554MB <SAMSUNG HD403LJ CT100-11> at ata8-master SATA300
acd0: DVDR <HL-DT-ST DVDRAM GSA-H62N/CL00> at ata10-master SATA150


On hat specific box I have the problem of  a crashing system everytime I 
reboot or shutdown. I reported this once in the list, but I was told it 
could be suspicious hardware. So I tested memory twice, thrice over 
hours without issue, I did stress tests while the box was up and running 
and tried to examine the harddrive via SMART monitoring tools. No issues 
found.

Is someone is willing giving advice how to save a core dump message on 
screen I will follow. yes, I'm aware of the debugging chapter in the 
handbook and I will perform this as soon as possible.

Regards,
Oliver