Please file a bug for this issue. Although the specification does not allow for relationships from Embeddable objects TopLink should and does. There seems to be a problem with the weaving of the OneToOne. The only workaround would be to remove the lazy nature of the relationship.
--Gordon
[Message sent by forum member 'gyorke' (gyorke)]
http://forums.java.net/jive/thread.jspa?messageID=236489