When creating a new course, allow Auth_UserModel::findCurrentUser() to throw an exception before the value is used.

If a user is a member of the root group, don't overide their edit privilege with that of individual roles.

Fix Requests_ApproverVoteModel::findUsersVotesForRequests() to not bomb out when given an empty array.

Add a check on Requests_ApprovalChainModel::consider() to be sure we aren't considering any completed requsets.