extraction of Mac revZipped file blocked on Win

[Phil Davis]

Has anybody else run into this?

On my Mac, I wrote code that uses the revZip library to create an archive from a 
folder full of files and subfolders. It works great! Then I copied the 47mb .zip 
file up to my NAS and down to Windows. I tried to extract all files using the 
standard Win 'compressed file' tool and got a message from Windows saying 
extraction was blocked because the compressed files were considered 'not safe' 
by Windows Firewall. This wasn't a message FROM the firewall; it didn't look 
like those.

OK, I changed my zip file permissions on Mac, copied it over to Win again, got 
same result.

Finally I downloaded a trial version of StuffIt Expander for Windows and tried 
using it with my file. It worked without a hitch, hiccup or notice of any kind! 
And of course all the files I had zipped are there on Windows now in perfect order.

Bottom line:
Can anyone offer a clue as to what caused my original problem?

FWIW, My Mac user account has admin privileges, as does my Win acct.

Thanks -
Phil Davis