virus in download of 7.2.2?

Not sure if it's a concern, but when I downloaded the 7.2.2 version, the MacAfee virus scan flags the file as
containinga virus.  
MD5 checks out OK.

Any idea why this happens?  And is there a possibility that users may be scared off after getting such a message?

Thanks,

Matt
(My net connection is currently via NT, unfortunately...)