diff --git a/AERN-RnToRm.cabal b/AERN-RnToRm.cabal
--- a/AERN-RnToRm.cabal
+++ b/AERN-RnToRm.cabal
@@ -1,5 +1,5 @@
 Name:           AERN-RnToRm
-Version:        0.4.9
+Version:        0.4.9.1
 Cabal-Version:  >= 1.2
 Build-Type:     Simple
 License:        BSD3
diff --git a/ChangeLog b/ChangeLog
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,15 +1,11 @@
-0.4.9:
+0.4.9.1: 24 February 2009: fixed errors in haddoc comments
+0.4.9: 23 February 2009
     * Added a quickcheck testing harness for the polynomial arithmetic core.
     * Rewritten polynomial arithmetic core.
     * Fixed many rounding errors affecting almost all operations.
     * New operation: substitution into an enclosure of a *monotone* function.
     * In enclosure arithmetic, now can set a limit on the size of each enclosure representation.
       This is important for many-variate polynomials that tend to have very many terms.
-      
-0.4.3:
-    * fixed two serious errors in exponentiation of PFEs
-    * added composition of a monotone function approx with another function approx
-      and implemented it for PFEs on individual domain boxes
 0.4.2: 1 December 2008
     * substantially improved division by a constant PFE (polynomial function enclosure)
     * added proper handling of overflown coefficients
diff --git a/src/Data/Number/ER/RnToRm/UnitDom/ChebyshevBase/Polynom.hs b/src/Data/Number/ER/RnToRm/UnitDom/ChebyshevBase/Polynom.hs
--- a/src/Data/Number/ER/RnToRm/UnitDom/ChebyshevBase/Polynom.hs
+++ b/src/Data/Number/ER/RnToRm/UnitDom/ChebyshevBase/Polynom.hs
@@ -3,7 +3,7 @@
 {-# LANGUAGE UndecidableInstances #-}
 {-|
     Module      :  Data.Number.ER.RnToRm.UnitDom.ChebyshevBase.Polynom
-    Description :  polynoms in the Chebyshev basis of the 1st kind
+    Description :  multivariate polynomials in the Chebyshev basis
     Copyright   :  (c) 2007-2008 Michal Konecny
     License     :  BSD3
 
diff --git a/src/Data/Number/ER/RnToRm/UnitDom/ChebyshevBase/Polynom/Enclosure.hs b/src/Data/Number/ER/RnToRm/UnitDom/ChebyshevBase/Polynom/Enclosure.hs
--- a/src/Data/Number/ER/RnToRm/UnitDom/ChebyshevBase/Polynom/Enclosure.hs
+++ b/src/Data/Number/ER/RnToRm/UnitDom/ChebyshevBase/Polynom/Enclosure.hs
@@ -2,7 +2,7 @@
 {-# LANGUAGE UndecidableInstances #-}
 {-|
     Module      :  Data.Number.ER.RnToRm.UnitDom.ChebyshevBase.Polynom.Enclosure
-    Description :  (internal) field operations applied to polynomials  
+    Description :  (internal) basic operations for primitive polynomial enclosures  
     Copyright   :  (c) 2007-2008 Michal Konecny
     License     :  BSD3
 
diff --git a/src/Data/Number/ER/RnToRm/UnitDom/ChebyshevBase/Polynom/Tests/Division.hs b/src/Data/Number/ER/RnToRm/UnitDom/ChebyshevBase/Polynom/Tests/Division.hs
--- a/src/Data/Number/ER/RnToRm/UnitDom/ChebyshevBase/Polynom/Tests/Division.hs
+++ b/src/Data/Number/ER/RnToRm/UnitDom/ChebyshevBase/Polynom/Tests/Division.hs
@@ -1,6 +1,6 @@
 {-|
     Module      :  Data.Number.ER.RnToRm.UnitDom.ChebyshevBase.Polynom.Tests.Division
-    Description :  (testing) properties of basic enclosure operations
+    Description :  (testing) properties of polynomial enclosure division
     Copyright   :  (c) 2007-2008 Michal Konecny
     License     :  BSD3
 
diff --git a/src/Data/Number/ER/RnToRm/UnitDom/ChebyshevBase/Polynom/Tests/Elementary.hs b/src/Data/Number/ER/RnToRm/UnitDom/ChebyshevBase/Polynom/Tests/Elementary.hs
--- a/src/Data/Number/ER/RnToRm/UnitDom/ChebyshevBase/Polynom/Tests/Elementary.hs
+++ b/src/Data/Number/ER/RnToRm/UnitDom/ChebyshevBase/Polynom/Tests/Elementary.hs
@@ -1,6 +1,6 @@
 {-|
     Module      :  Data.Number.ER.RnToRm.UnitDom.ChebyshevBase.Polynom.Tests.Elementary
-    Description :  (testing) properties of basic enclosure operations
+    Description :  (testing) properties of enclosure elementary operations
     Copyright   :  (c) 2007-2008 Michal Konecny
     License     :  BSD3
 
diff --git a/src/Data/Number/ER/RnToRm/UnitDom/ChebyshevBase/Polynom/Tests/Generate.hs b/src/Data/Number/ER/RnToRm/UnitDom/ChebyshevBase/Polynom/Tests/Generate.hs
--- a/src/Data/Number/ER/RnToRm/UnitDom/ChebyshevBase/Polynom/Tests/Generate.hs
+++ b/src/Data/Number/ER/RnToRm/UnitDom/ChebyshevBase/Polynom/Tests/Generate.hs
@@ -315,9 +315,9 @@
      DomainBoxMappable boxb boxbb varid b [ERInterval b], Show boxb, Show testId) =>
     String {-^ report file name -} ->
     testId {-^ item to identify the random input given to the test -} ->
-    ((ERInterval b) -> (ERInterval b) -> (ERInterval b)) ->
+    ((ERInterval b) -> (ERInterval b) -> (ERInterval b))
         {-^ this real approx operation has to return an inner approximation of the exact result set, 
-            ie each number that the approximation supports is in the maximal extension -}
+            ie each number that the approximation supports is in the maximal extension -} ->
     (ERChebPoly box b, ERChebPoly box b) {-^ enclosure of argument 1 -} ->
     (ERChebPoly box b, ERChebPoly box b) {-^ enclosure of argument 2 -} ->
     (ERChebPoly box b, ERChebPoly box b) {-^ alleged enclosure of result -} ->
@@ -361,9 +361,9 @@
      DomainBoxMappable boxb boxbb varid b [ERInterval b], Show boxb, Show testId) =>
     String {-^ report file name -} ->
     testId {-^ item to identify the random input given to the test -} ->
-    ((ERInterval b) -> (ERInterval b)) ->
+    ((ERInterval b) -> (ERInterval b))
         {-^ this real approx operation has to return an inner approximation of the exact result set, 
-            ie each number that the approximation supports is in the maximal extension -}
+            ie each number that the approximation supports is in the maximal extension -} ->
     (ERChebPoly box b, ERChebPoly box b) {-^ enclosure of argument -} ->
     (ERChebPoly box b, ERChebPoly box b) {-^ alleged enclosure of result -} ->
     Bool
@@ -406,9 +406,9 @@
      DomainBoxMappable boxb boxbb varid b [ERInterval b], Show boxb, Show testId) =>
     String {-^ report file name -} ->
     testId {-^ item to identify the random input given to the test -} ->
-    (boxb -> (ERInterval b)) ->
+    (boxb -> (ERInterval b))
         {-^ this operation has to return an inner approximation of the exact result set, 
-            ie each number that the approximation supports is a solution in the maximal extension -}
+            ie each number that the approximation supports is a solution in the maximal extension -} ->
     [varid] {-^ variables to test over -} ->
     (ERChebPoly box b, ERChebPoly box b) {-^ alleged enclosure of result -} ->
     Bool
