There's no %A in Python 2.x!
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 8e18302..c30d568 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -681,7 +681,7 @@
          if (*f == '%') {
              if (*(f+1)=='%')
                  continue;
-             if (*(f+1)=='S' || *(f+1)=='R' || *(f+1)=='A')
+             if (*(f+1)=='S' || *(f+1)=='R')
                  ++callcount;
              while (isdigit((unsigned)*f))
                  width = (width*10) + *f++ - '0';