Validate failure: th/T7064

I'm seeing the following failure (amongst others) in my validate runs:

cd ./th && ./T7064    </dev/null >T7064.run.stdout 2>T7064.run.stderr
Actual stdout output differs from expected:
--- ./th/T7064.stdout   2012-08-20 15:14:13.000000000 +0100
+++ ./th/T7064.run.stdout       2012-10-24 13:02:46.722601373 +0100
@@ -19,8 +19,8 @@
      GHC.Real.fromIntegral
      = GHC.Base.id :: forall a_0 . a_0 -> a_0 #-}
  {-# RULES "rule2" [1]
-    forall (x_1627391611 :: a_1627391612) . GHC.Real.fromIntegral 
x_1627391611
-    = x_1627391611 #-}
-{-# RULES "rule3" [~1]
      forall (x_1627391609 :: a_1627391610) . GHC.Real.fromIntegral 
x_1627391609
      = x_1627391609 #-}
+{-# RULES "rule3" [~1]
+    forall (x_1627391607 :: a_1627391608) . GHC.Real.fromIntegral 
x_1627391607
+    = x_1627391607 #-}
*** unexpected failure for T7064(normal)


Does anyone know what this is?

Cheers,
	Simon