[strike]if i'm reading the data correctly, the caution is a false alarm. SMART data though verys from vender to vender though so i may be wrong.[/strike]
something that might be better at this than me, Speed Fan has a HDD SMART data analysis option that will submit your SMART data to
http://www.hddstatus.com/index.php and give you a break down on what might be going on.
edit...
the hard drive is quite old looking things over again. A new hard drive might be in order simply due to age, as if its not failing now, it will eventually.