Why was it necessary to bundle the _MACOSX and .DS_Store files with the zip download? I rarely see zip files with thumbs.db or desktop.ini files in them.
I'm assuming they put the files in a folder, right-clicked, and hit "Compress" in Finder. Finder takes the HFS+ metadata that can't be natively stored in the zip file and turns them into the files you mentioned.
its terrible when Windows (ouh ouh EVIL MS) does stuff like that
it's normal when Mac OSX does it.
Lets push this further. It's ok when github hijacks your right click (makes the logo download more annoying while pretending to make things nicer).
It's terrible if MS/Mozilla/Whoever isn't hype right now does it.