Boot sector errors!?



I just encountered for the second time in two days a boot sector error on the OS X partition. I don't know if it is some OS X software I am installing or booting back into OS 9, but something is messing with the boot sector.

I installed:
Docking Manuvers
Drop Things
and a few other things.

The other day the boot sector errors were so bad that the machine would not boot. Any ideas?

David Armour