Can't send email to an icloud group in address book

Hi

I have set up some groups in icloud. I called one of these groups "Test", with only myself as a group member. In address book, when I right click to send email to "Test", it fires up a new email with the word Test in the email "to" field. If I try to send the email I get the error message "Test" doesn't seem to be a valid email address. It doesn't seem to be filling in the group email addresses in the "to" field.

Am I doing something wrong?, or is this a known or unknown bug?

I have other groups set up but I obviously don't want to send test emails out hence the test group "Test"

Also when I edit the distribution list and right click the group name, "send email to "Test" is greyed out.

Many thanks in advance