compizconfig-settings-manager seems to me to satisfy the definition of Suggests in debian-policy[0]. In any case this is only a minor issue. I went to use the menu option the other day only to find that it wasn't there because compizconfig-settings-manager wasn't installed.
[0] http://www.debian.org/doc/debian-policy/ch-relationships.html#s-binarydeps -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]

