Hmmmm......well, did a full scan with McAfee.....no issues found. Both Open and Test run fine. When you do a Google search for SHeur2.QNR it only appears to pull references to AVG sites. Sounds like a case of mistaken identity on AVG falsely identifying a file....unless we truly have some users with a trojan.
http://www.avg.com/
Update AVG - AVI 270.10.23/ 1953
Added detection of new variant of Worm/Autoit.RQN, new variants of trojans PSW.Generic6.BDIY, SHeur2.QNR, Generic12.BPHA, PSW.Ldpinch.XAQ, PSW.OnlineGames.BPTA.
February 14, 2009