Actually, I think I was using commons-compress at some point, so for linux users, the Info-Zip headers are in place.  It's just mac where they don't show up :)

That said, do you want me to document the "useNativeZip" settings?  It will shell out to the linux "zip" command instead of using Java's, which places the magic bits in place to preserve permissions (we use this on activator + typesafe console).