--- Objects/unicodeobject.c	2009-04-05 23:48:06.000000000 +0200
+++ /tmp/unicodeobject.c	2009-07-04 01:11:31.000000000 +0200
@@ -5433,8 +5433,9 @@
             Py_UNICODE_ISUPPER(ch) ||
             Py_UNICODE_ISTITLE(ch))
             previous_is_cased = 1;
-        else
+        else if (!Py_UNICODE_ISCASEIGNORABLE(ch)) {
             previous_is_cased = 0;
+        }
     }
     return 1;
 }
@@ -6871,8 +6872,9 @@
             previous_is_cased = 1;
             cased = 1;
         }
-        else
+        else if (!Py_UNICODE_ISCASEIGNORABLE(ch)) {
             previous_is_cased = 0;
+        }
     }
     return PyBool_FromLong(cased);
 }