FAQ:Norton Antivirus reports WS.Reputation.1 in the nightly build. What gives?
Norton Antivirus has a "feature" that classifies anything it doesn't recognize as a virus. A good discussion about this "feature" is available at http://community.norton.com/t5/Norton-Internet-Security-Norton/WS-Reputation-1-is-NOT-helpful/td-p/537550. Since the nightly build obviously changes very frequently, it is not possible to whitelist globally with Norton.
The MakeHuman crew perceives this phenomenon as a bug with Norton Antivirus, and not with MakeHuman, and will refer any reports of the issue to Norton.
The suggested solution is to either switch the antivirus solution or to manually whitelist the binary on your local computer.