diff --git a/.hg_archival.txt b/.hg_archival.txt
deleted file mode 100644
--- a/.hg_archival.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-repo: 73f9f23123106e581edbcf74b725d9a23e2eb1f4
-node: bd4d9234cf7e7a1fa4b8c5a47f711348d0192a7c
diff --git a/.hgtags b/.hgtags
deleted file mode 100644
--- a/.hgtags
+++ /dev/null
@@ -1,3 +0,0 @@
-9e2bed8ab08ad6f310093bec0c339ae8f6ddb142 0.0.2
-6ad8883193562cd2d520d765028713a689fe43b1 0.1
-8a3c94fd99a61ca2a002f71edaa0594fa8d54e27 0.1
diff --git a/examples/Setup.hs b/examples/Setup.hs
deleted file mode 100644
--- a/examples/Setup.hs
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/usr/bin/env runhaskell
-
-import Distribution.Simple
-
-main = defaultMain
diff --git a/examples/example1.hs b/examples/example1.hs
deleted file mode 100644
--- a/examples/example1.hs
+++ /dev/null
@@ -1,56 +0,0 @@
-module Main where
-import Graphics.UI.Gtk
-import Graphics.UI.Gtk.Gdk.EventM
-import Graphics.Rendering.Cairo
-import Graphics.UI.Gtk.Layout.Rpn
-import Data.Monoid
-
-title :: String -> [AttrOp Window]
-title s = [windowTitle := s]
-pressed :: Signal Widget (EventM EButton Bool)
-pressed = buttonPressEvent
-
-main = do
-    initGUI
-
-    -- Create a new operator  that takes a label
-    -- and a button  and pack then 
-    -- in a horizontal box .
-
-    let line s = mconcat [
-         rLABEL s,
-         rRIGHT,
-         rBUTTON s $ return (),
-         rCENTER,
-         rHBOX [PackGrow,PackGrow]
-         ]
-
-    -- Create a new operator  that packs many 'line'
-    -- in a vertical box .
-
-    let column = mconcat $ [
-         line "One Button",
-         line "Another Button",
-         line "Yet Another Button",
-         line "Last Button",
-         rVBOX $ replicate 4 PackGrow
-         ]
-
-    -- Take two copies of 'column' and add  then
-    -- to a notebook . Then create a stock button
-    --  and attach a action to an event . Then
-    -- join the notebook and that button in a vertical box.
-    -- Insert everything in a main window , and
-    -- finally make everything into widgets .
-
-    [mainWindow] <- widgetsFromRpn [
-         column,
-         column,
-         rNOTEBOOK ["First Page","Second Page"],
-         rBUTTON stockQuit mainQuit,
-         rVBOX [PackGrow,PackNatural],
-         rMAIN "Layout.Rpn Example"
-         ]
-
-    widgetShowAll mainWindow
-    mainGUI
diff --git a/examples/examples.cabal b/examples/examples.cabal
deleted file mode 100644
--- a/examples/examples.cabal
+++ /dev/null
@@ -1,12 +0,0 @@
-cabal-Version: >= 1.2
-name: gtk2hs-rpn-examples
-version: 1
-build-type: Simple
-license: PublicDomain
-maintainer: Maurício CA <mauricio.antunes@gmail.com>
-Executable example1
-  main-is: example1.hs
-  build-depends: base, gtk, gtk2hs-rpn, mtl, cairo
-  hs-source-dirs: .
-  extensions:
-    NoMonomorphismRestriction
diff --git a/gtk2hs-rpn.cabal b/gtk2hs-rpn.cabal
--- a/gtk2hs-rpn.cabal
+++ b/gtk2hs-rpn.cabal
@@ -1,6 +1,7 @@
 cabal-Version: >= 1.2
 name: gtk2hs-rpn
-version: 0.1
+version: 0.2
+homepage: http://bitbucket.org/mauricio/gtk2hs-rpn
 synopsis:
   Adds a module to gtk2hs allowing layouts to be defined using
   reverse polish notation.
@@ -18,11 +19,18 @@
 license-file: LICENSE
 maintainer: Maurício CA <mauricio.antunes@gmail.com>
 category: GUI
+bug-reports: http://bitbucket.org/mauricio/gtk2hs-rpn/issues
 Library
-  build-depends: base, gtk >= 0.10, cairo, mtl, glib
+  build-depends:
+    base >= 4 && < 5,
+    gtk >= 0.11 && < 0.12,
+    cairo >= 0.11 && < 0.12,
+    glib >= 0.11 && < 0.12,
+    mtl >= 1.1.0.2 && < 1.2
   hs-source-dirs: src
   extensions:
     NoMonomorphismRestriction
+    ScopedTypeVariables
   exposed-modules:
     Graphics.UI.Gtk.Layout.Rpn
   other-modules: RPN, Basic, CanBeCasted
diff --git a/src/CanBeCasted.hs b/src/CanBeCasted.hs
--- a/src/CanBeCasted.hs
+++ b/src/CanBeCasted.hs
@@ -4,7 +4,6 @@
     CanBeCasted (glibCast)
  ) where
 import Graphics.UI.Gtk
-import Graphics.UI.Gtk.Types
 
 -- | 'CanBeCasted' class allows casting between some
 -- 'System.Glib.GObject.GObjectClass' instances.
diff --git a/src/Graphics/UI/Gtk/Layout/Rpn.hs b/src/Graphics/UI/Gtk/Layout/Rpn.hs
--- a/src/Graphics/UI/Gtk/Layout/Rpn.hs
+++ b/src/Graphics/UI/Gtk/Layout/Rpn.hs
@@ -137,7 +137,7 @@
 
 configScale io w = do
   set w [rangeUpdatePolicy := UpdateDelayed]
-  adj <- A.get w rangeAdjustment
+  (adj::Adjustment) <- A.get w rangeAdjustment
   v1 <- A.get adj adjustmentLower
   v2 <- A.get adj adjustmentUpper
   set w [rangeValue := (v2+v1)/2]
@@ -197,7 +197,7 @@
  tCBKSPIN $ configSpin io]
 
 configSpin io w = do
-  adj <- A.get w spinButtonAdjustment
+  (adj::Adjustment) <- A.get w spinButtonAdjustment
   v1 <- A.get adj adjustmentLower
   v2 <- A.get adj adjustmentUpper
   set w [spinButtonValue := (v2+v1)/2]