We're getting a strange issue with the 4.5 RC3 and the Survey Module. Setup a simple one question, two answer survey. Set to public. Logout and select an answer, click submit and get this displayed below the survey:
The survey is incomplete. Please complete and resubmit.
Seems like a validator issue. There is nothing in the Event Log. Chaning all settings does not change the behaivior.
(note: posted this in the release forum as well)