Frequent 'Filesystem Corrupt', Invalid File count

[OngL]

I have been getting this message every a couple of days in my MBP or iMac running 10.6.2. It happens/visible only when I runs Disk Utility and Verify Disk. Of course, this brings unsettling point to me when it comes now and then. Not to mention I have to boot from DVD to run disk utility to fix this

Error Message: Invalid file count (It should be xxxxx instead of xxx+1) AND
Error Message: Invalid volume directory count (It should be xxxxx instead of xxxx-1)

Any idea what causes this and what's the impact i.e. do I lose any files?

Thanks!!

 

[Queso]

Try an fsck -y from Single User mode and see whether it removes the problem. It will check your disk's file system and correct any errors it finds.

Instructions on the Apple website here (scroll down a bit).