Can't email Numbers 3.0 or Pages 5.0 documents via Google Mail (Gmail) When I try to email a Numbers 3.0 or Pages 5.0 document via Google Mail, I receive the following error.
It appears that with the new version of Numbers, Apple changed from using files to using folders that appear as files. Gmail will not allow folders to be emailed.

Google Groups Forum: Can't send an email with Apple .PAGES attachment document.