I upgraded to Moodle 2.1.4+ and numerical calculated questions are showed as incomplete in the list before sending and finishing the quiz. It seems that the decimal point is recognized as thousand separator because this message appears in interactive mode. When no decimal point or a comma is used instead, then the question is not showed as incomplete.
When I review the quiz, the answers are graded correctly, but this problem had created a lot of confusion among students, and in Mexico we are not used to use the comma as decimal point.
What can I do to fix this problem?