I know not many people use antivirus software on the Mac, but nevertheless those that do deserve a warning. I am an iAntivirus user and today went to update iAntivirus. When I did so I got a message saying "Invalid update file" I went to iAntivirus' website to try and post on their message board, but by going to their website you will see that the domain expired yesterday on September 11th. What's scary about this besides that a professional company would allow their website to expire is there is nothing from keeping a person from buying the domain and then putting malware on there and infecting Macs that choose to update iAntivirus. This is possible because you have to give your administrator password to install iAntivirus in the first place.