If a survey is set to Scored (Settings menu) and through the Completion option a conditional end message is created including the use of the ::score:: tag to show the total score only the text ::score:: is shown after submitting the survey.

Cause: the file in ... Reflector\Nsurvey_BLL\Votations.NSurvey.BusinessRules\Survey.cs

Solution:

public string GetThanksMessage(int surveyId, VoterAnswersData surveyAnswers, bool evaluateScores)
.......

                if ((evaluateScores && (row.MessageConditionalOperator == 4)) && (scoreTotal > row.Score))
                {

// removed: return row.ThankYouMessage;
// added:

                   thankYouMessage = row.ThankYouMessage;
                }

.........

Note: replace every - return row.ThankYouMessage; - with the - thankYouMessage = row.ThankYouMessage; -

The fix will be part of the next Survey Release.