Mail + Address Book - groups not working

Question

I'm able to create groups just fine in Address book.
However when it comes to using them in Mail, they won't work:
I type the first couple of characters and Mail offers to auto-complete,
so it does know about them. When I hit return at that point *nothing*
appears in the address field, it just stays blank.
Any ideas what's going on here and how to fix it?

Answer 1

Hi jwabbit, I was interested in your reply since it sounded easy to implement. However, my issue is similar but is not fixed with your solution.
I have created a group in Mail. It displays fine and when I type the first few letters of the name in the "To" box of a new blank email, the name of the group pops up. However, when I press return it only adds the first 2 names out of 8 in the group.
I have checked that all the names are ones that I have used regularly for some weeks, so they are real emails.
The other thing I tried was to have both Mail and Contacts open at the same time, then selected all the names in the group and tried dragging and dropping over the To box in Mail. However, again it simply adds the first 2 names and ignores the others.
Each of the other 6 names add fine individually, but that defeats the point of setting up the group!
Any thoughts?