If you are using a Mac with OS 10.6. Please take some time to make sure your software is completely updated.
Apple secretly updates Mac malware protection | 1digg |

Apple's 10.6.4 operating system upgrade earlier this week silently updated the malware protection built into Mac OS X to protect against a backdoor Trojan horse that can allow hackers to gain remote control over your treasured iMac or MacBook
http://www.sophos.com/blogs/gc/g/2010/06/18/apple-secretly-updates

