You can no longer catch non-BaseException objects; TypeError is raised if such
an object is listed in an 'except' clause.
diff --git a/Misc/NEWS b/Misc/NEWS
index c20793e..91e1f02 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -28,6 +28,8 @@
 Core and Builtins
 -----------------
 
+- Objects listed in an 'except' clause must inherit from BaseException.
+
 - PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
   and .keys(), .items(), .values() return dict views.