Have you tried reopening the saved file on the PC? That will tell if the save was correct on that platform.
Then how was the file send to the Mac? Did you compress it yourself, or did your email client do that? Have you tried moving it via either FTP server, DropBox, or USB drive?
Have you tried a one page FC file and transferring that file?
Just some initial thoughts to try.
When I copied the file using a USB media, it works fine. I guess email messes with the file somehow. Never saw this before.
Thanks a bunch for your suggestion!