same here... stuffitExpander works!

Same here, thought it was a Mountain Lion bug, but I was able to open other zip files with no problem.

Guys, I don't own a Mac :p. Can someone give me an example of a working zip file and a "corrupted" zip (please try to make them smaller as possible)? I'll try to see what's wrong... Can can send them at gildas.lormeau [at] gmail.com.

Can someone try to replace at line 847 in zip.js:
if (!dontDeflate && options.level != 0)
with:
if (!dontDeflate && options.level != 0 && !options.directory)
and tell me if it fixes this issue?

It should be ok now :). Do not hesitate do reopen the issue if there's still a problem.

Special thanks to @hrambelo and @ylesaout!

Glad to see you got it ! @gildas-lormeau you rocks ;) Actually, it seems an os x bug (unbelievable-with-reboot proposed solution1 and solution2), fortunately CLI come to the rescue with /usr/bin/zip.
You welcome man, do not hesitate if there's anything I can do (testing another zip or so ...)