Looks like we have a new false positive. It's Comodo again (it's had issues before). It's a false positive in every app it appears (it's finding a virus that didn't even exist at the time the files were posted). If you use Comodo, please post details of the file and virus and be sure to contact Comodo to inform them of their error.
Mine detects “Trojan-downloader.win32.agent.bcw” in c:\temp\ns*.tmp\system.dll (the .tmp folder varies, but it always starts with "ns"; nslc8.tmp, nsica.tmp, etc). I emailed Comodo to see if they'll provide an update.
It would seem it's detecting the Nullsoft Scriptable Installer System's System component as a virus. This is a standard piece of NSIS used for certain system functions. Everything from message boxes with custom icons to calculating disk space. They should have been notified as this will break lots of commercial and open source installers.
Sometimes, the impossible can become possible, if you're awesome!
I haven't received an official notification from Comodo about my support ticket, but I don't get errors any more. It looks like they may have fixed it.