diff --git a/pyglance/glance/compare.py b/pyglance/glance/compare.py
index 2e21b3925b1bfa326b3dc79f687c0190fd6e6b8c..a14f49017d3e93143f28f67ab45b86d1992f28a0 100644
--- a/pyglance/glance/compare.py
+++ b/pyglance/glance/compare.py
@@ -550,10 +550,8 @@ def _check_pass_or_fail(varRunInfo, variableStats, defaultValues) :
     # check to see if it failed on nonfinite data
     if not (nonfiniteTolerance is None) :
         non_finite_pts = variableStats['Finite Data Statistics']['finite_in_only_one_count']
-        non_finite_pts = non_finite_pts + variableStats['Missing Value Statistics']['common_missing_count'] # TODO, should this line be removed?
-        non_finite_pts = non_finite_pts + variableStats['NaN Statistics']['common_nan_count']
-        non_finite_fraction = float(non_finite_pts) / float(variableStats['General Statistics']['num_data_points'])
-        passedNonFinite = non_finite_fraction <= nonfiniteTolerance
+        non_finite_diff_fraction = float(non_finite_pts) / float(variableStats['General Statistics']['num_data_points'])
+        passedNonFinite = non_finite_diff_fraction <= nonfiniteTolerance
         
         # combine the two test results
         if (didPass is None) :
diff --git a/pyglance/glance/exconfig.py b/pyglance/glance/exconfig.py
index 1f29e0823e5a1a5eab5d7fea2e2042f599ad0cd4..b1e99d7429eba17bff92268d9a4fb5ed618af170 100644
--- a/pyglance/glance/exconfig.py
+++ b/pyglance/glance/exconfig.py
@@ -69,7 +69,8 @@ defaultValues = {'epsilon': 0.0,                        # the acceptable differe
                                                         # None indicates that variables should not be tested
                                                         # on nearness of epsilon comparison
                                                         
-                 'nonfinite_data_tolerance': None,      # the allowed fraction of non-finite data
+                 'nonfinite_data_tolerance': None,      # the allowed fraction of non-finite data that
+                                                        # that differs between the two files
                                                         # None indicates that variables should not be tested
                                                         # on amount of non-finite data