diff --git a/CHANGELOG.markdown b/CHANGELOG.markdown
--- a/CHANGELOG.markdown
+++ b/CHANGELOG.markdown
@@ -1,6 +1,16 @@
+0.4.0.3
+-------
+* Fixed doctest issues caused by `vector` 0.11
+* Unfortunately the `herbie` changes turned out to be flawed (due to issue mikeizbicki/HerbiePlugin#8). Rolling them back for now.
+
+0.4.0.2
+-------
+* Fixed a haddock issue caused by the comments in the herbie code.
+
 0.4.0.1
 -------
 * Added `vector` 0.11 support.
+* Incorporated some changes suggested by the HerbiePlugin.
 
 0.3.4
 -----
diff --git a/hyperloglog.cabal b/hyperloglog.cabal
--- a/hyperloglog.cabal
+++ b/hyperloglog.cabal
@@ -1,6 +1,6 @@
 name:          hyperloglog
 category:      Numeric
-version:       0.4.0.2
+version:       0.4.0.3
 license:       BSD3
 cabal-version: >= 1.8
 license-file:  LICENSE
diff --git a/src/Data/HyperLogLog/Type.hs b/src/Data/HyperLogLog/Type.hs
--- a/src/Data/HyperLogLog/Type.hs
+++ b/src/Data/HyperLogLog/Type.hs
@@ -91,6 +91,7 @@
 -- >>> import Control.Lens
 -- >>> import Data.Reflection
 -- >>> import Data.Monoid
+-- >>> import qualified Data.Vector.Unboxed as V
 
 ------------------------------------------------------------------------------
 -- HyperLogLog
@@ -100,8 +101,8 @@
 --
 -- Initialize a new counter:
 --
--- >>> mempty :: HyperLogLog 3
--- HyperLogLog {runHyperLogLog = fromList [0,0,0,0,0,0,0,0]}
+-- >>> runHyperLogLog (mempty :: HyperLogLog 3) == V.fromList [0,0,0,0,0,0,0,0]
+-- True
 --
 -- Please note how you specify a counter size with the @n@
 -- invocation. Sizes of up to 16 are valid, with 7 being a
@@ -194,12 +195,12 @@
   m' = fromIntegral (numBuckets n)
   numZeros = fromIntegral . V.length . V.filter (== 0) $ bs
   res = case raw < smallRange n of
-    True -- numZeros > 0 -> m' * log (m' / numZeros) -- 13.47 bits max error
-         | numZeros > 0 -> m' / 1 / (log m' - log numZeros) -- 6.47 bits max error
+    True | numZeros > 0 -> m' * log (m' / numZeros) -- 13.47 bits max error
+         -- numZeros > 0 -> m' / 1 / (log m' - log numZeros) -- 6.47 bits max error
          | otherwise -> raw
     False | raw <= interRange -> raw
           -- otherwise -> -1 * lim32 * log (1 - raw / lim32) -- 44 bits max error
-          | raw / lim32 < -1.7563532969399233e-6 -> - log (1 - (raw / lim32)) * lim32 -- 5.39 bits max error
+          -- raw / lim32 < -1.7563532969399233e-6 -> - log (1 - (raw / lim32)) * lim32 -- 5.39 bits max error
           | otherwise -> raw + (raw / lim32) * raw
 
   raw = rawFact n * (1 / sm)