As a result of listening to a couple Netcasts, I have been made aware of a security problem, if you use AVAST as your Anti Virus software. I have used AVAST for a long time, but it has now been removed from my MacBook Pro laptop.
I have replaced AVAST with SOPHOS, which I have used in the past.
This is just a heads-up to anyone using AVAST as their AV.
The following Netcast of Security Now covers the problem, but the video is a 2 hour video.