I have the same issue. It is not posting, turned on debug and got the below message. Anybody have a clue?
2012-09-10 19:12:21 : publish_to_gplus running, included wpgplus.php
2012-09-10 19:12:21 : publish_to_gplus running, postID is 899
2012-09-10 19:12:21 : wgplus_safe_post_google running, post_id is 899
2012-09-10 19:12:21 : just requested the login info