Looking in CVS, that bug was fixed a long time ago (2.03). It also works fine on my copy here. Take a look at admin/GMail/AddressBook.pm line ~188. It should look like this:
I just looked at the demo code, and for some reason it doesn't have that change.
Adrian
Code:
if ($cgi->{address_email} and $DB->table('address')->count({ address_userid => $USER->{userid}, address_email => $cgi->{address_email} }) > 1) {Adrian