--- master.py	2012-03-19 19:09:31.263840109 +0530
+++ new.py	2012-03-19 19:09:45.963861668 +0530
@@ -1116,8 +1116,11 @@ class ClassSection(models.Model):
         else:
             return reduce(lambda x,y: x+y, [r.num_students for r in ir]) 
             
-    def isFull(self, ignore_changes=False) 
-        return (self.num_students() >= self._get_capacity(ignore_changes))
+    def isFull(self, ignore_changes=False):
+        if(self.num_students()==self._get_capacity(ignore_changes)==0)
+            return 0
+        else 
+            return (self.num_students() >= self._get_capacity(ignore_changes))
 
     def time_blocks(self):
         return self.friendly_times(raw=True)