Is this a Lion problem?
When I download a rar or zip or whatever and decompress it, sometimes the files will be locked and I need to open them individually. A message will pop up telling me that I downloaded an application from the internet. Really awful when this happens to a manga I want to read.
EDIT: Andysol and DocNo42, please kiss Apple's ass elsewhere you blind mindless apologists. And learn how to edit your fucking posts.