I just ran MVT here to check this and it detected the same thing and fixed it.
Artemis is the name McAfee software gives anything unknown that it has detected. It then submits them to the labs automatically for analysis and, in the case of false positives, eventual clearance,
I guess the Artemis Server is what it uses at the McAfee end.
When I clicked 'More information' in MVT I got this FAQ: http://service.mcafee.com/faqdocument.aspx?lc=1033&id=TS101891
I would disregard the detection if it's detected again after being fixed. But MVT should fix that error.