Is Google confused about Android security?

While Google is obviously trying to create a safer environment in regard to the Android operating system, some of these changes are leaving me a bit confused. I recently discovered some interesting behavior in regard to the default email client in 4.0 Ice Cream Sandwich.

It seems that if you try to download or open a zip file attachment from within the email client, Google warns of the possibility of malware:

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Story added 16. March 2012, content source with full text you can find at link above.