I installed Norton Personal Firewall 3 onto my Mac OS 10.3.2 system and I found out if you use Fast user switching Mac OS X crashes. I did a clean install of 10.3.2 and installed Norton Personal Firewall 3 again and it still crashed, I downloaded the latest update for the software & it still crashed. SO I un-installed it. Version 2 works fine. But then again there is the free industrial strength firewall in OS X.
Stuff only works when you need to fix a HD problem (none of that individual file problem fixes -- aka, file blender) when booting from another volume. Basically just catalog/disk level repairs. The deleted file recovery stuff would be nice, but the method in which it works is at odds with bug free operation -- so don't throw important crap away.