Well that raises a couple of points I think, the first is that there are many other antivirus solutions for Linux that you are free to use if you think one is better - just google 'antivirus + linux', and the second is that your Linux box doesn't have any viruses - that is because there aren't any, so really unless you are using windows drivers or tools like the OP (who could have a virus in those files, though I doubt it) then all antivirus solutions are a waste of resources - For Now. So why not have the one that uses the least resources - and I am pretty sure that is clamav (because it doesn't do 'real time' scanning like some).
The only reason I have antivirus installed is that I use online banking and some (many perhaps??) banks have a clause written in the small print of their t+c's that says that if you don't have an antivirus product on your computer and you lose money through their online services, they won't compensate you.
Edit. Some more information. If you look at this page:http://www.clamav.net/lang/en/sendvirus/submit-fp/
You will see that although it is perfectly possible to submit 'false positive' files to clamav for inspection, they will automatically reject anything with the term 'PUA' in it's title as this is not a virus but a 'Potentially Unwanted Application' - they don't go into details on that term though. All the files mentioned in this thread so far are PUA's not viruses.
Edit 2. Correction to the above - here are the details of PUA's:http://www.clamav.net/lang/en/faq/pua/
Fujitsu Lifebook AH532 Laptop. Intel i5 processor, 6Gb ram, Intel HD3000 graphics, Intel Audio/wifi. Realtek RTL8111/8168B Ethernet.Ubuntu12.10 (Unity), Mint14 (Cinnamon), Manjaro (Xfce).