Virus!

When I download the 1.4.2 server pre-release, my firewall McAfee blocks it saying there is a virus inside called "PWS-Zbot.gen.alu!dam". When I tried to download the 1.4 server it did the same, as well as the normal 1.3.2 single and server downloads! McAfee has this virus stored as a known threat in it's online database, and I'm not going to tell my firewall to let the virus through. Please fix this if it's a real problem!