This is on feisty herd 3 (as mentioned in the subject line). The behaviour has changed between edgy and feisty.
-- [Feisty Herd 3] nautilus-cd-burner ejects CD after burn https://launchpad.net/bugs/84028 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs