It does look quite serious so if you do happen to own one like me, I think you'll have to resolve this issue otherwise your drive may have its life span shortened. The flaw is the Intellipark (aka Idle 3 mode) technology which puts the drive in idle mode after just 8 seconds of inactivity. According to a [url=http://www.silentpcreview.com/forums/viewtopic.php?f=7&t=51401]user here on this site[/url], this technology might not be compatible with some software an operating systems, meaning the drive will shut down indefinitely after 8 secs, thus, reducing the life span.
More info and a download link for the fix: http://www.ngohq.com/news/19805-critical-design-flaw-found-in-wd-caviar-green-hdds.html