Has anyone experienced Palimpsest discrepancies?

Palimsest in Fedora 16 reports a disk (MAXTOR STM3320620AS) as failing:  "DISK HAS MANY BAD SECTORS" etc.
SMART:  197 Current pending Sector Count Value -4 sectors.

Palimsest in Fedora 17 beta reports the same disk (MAXTOR STM3320620AS) as "OK"
SMART:  197 Current pending Sector Count 0 sectors  OK.

Obviously one is incorrect, which one?

Regards.