diff --git a/pylot/core/pick/compare.py b/pylot/core/pick/compare.py
index 2d7b55da..2718a39f 100644
--- a/pylot/core/pick/compare.py
+++ b/pylot/core/pick/compare.py
@@ -155,7 +155,7 @@ class Comparison(object):
         method = operator.methodcaller(method_name)
         pdf_list = self.get_all(phase)
         rarray = map(method, pdf_list)
-        return rarray
+        return np.array(rarray)
 
     def get_expectation_array(self, phase):
         return self.get_array(phase, 'expectation')
diff --git a/pylot/core/util/widgets.py b/pylot/core/util/widgets.py
index 12ebbbca..71e668b6 100644
--- a/pylot/core/util/widgets.py
+++ b/pylot/core/util/widgets.py
@@ -238,8 +238,10 @@ class ComparisonDialog(QDialog):
             bbox_props = dict(boxstyle='round', facecolor='lightgrey', alpha=.7)
             for phase in self.phases:
                 std = self.data.get_std_array(phase)
+                std = std[np.isfinite(std)]
                 stdxlims = [0., 1.2 * max(std)]
                 exp = self.data.get_expectation_array(phase)
+                exp = exp[np.isfinite(exp)]
                 eps_exp = 0.05 * (max(exp) - min(exp))
                 expxlims = [min(exp) - eps_exp, max(exp) + eps_exp]
                 axes_dict[phase]['std'].hist(std, range=stdxlims, bins=20, normed=False)