I feels quite unsafe, when I get a warning saying the binary cannot be verified in any OS. Have you guys thought about doing a signed release of the software binaries? Apparently, you could get free code signing certificate from CERTUM for windows,as mentioned in this article http://pete.akeo.ie/2011/11/free-code-signing-certificate-for-open.html .
It would be great if you guys plan to sign the code and avoid the moment of suspicion that raise during installation.