diff --git a/CHANGELOG b/CHANGELOG
index 61f6013..a6a44b1 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,32 +1,32 @@
-Changelog
+* Fixed gem install rake task
+* Improve Error encapsulation in liquid by maintaining a own set of exceptions instead of relying on ruby build ins
 
-Added If with or / and expressions
+* Added If with or / and expressions
 
-Implemented .to_liquid for all objects which can be passed to liquid like Strings Arrays Hashes Numerics and Booleans. 
-To export new objects to liquid just implement .to_liquid on them and return objects which themselves have .to_liquid methods. 
+* Implemented .to_liquid for all objects which can be passed to liquid like Strings Arrays Hashes Numerics and Booleans. To export new objects to liquid just implement .to_liquid on them and return objects which themselves have .to_liquid methods. 
 
-Added more tags to standard library
+* Added more tags to standard library
 
-Added include tag ( like partials in rails )
+* Added include tag ( like partials in rails )
 
-[...] Gazillion of detail improvements
+* [...] Gazillion of detail improvements
 
-Added strainers as filter hosts for better security [Tobias Luetke]
+* Added strainers as filter hosts for better security [Tobias Luetke]
 
-Fixed that rails integration would call filter with the wrong "self" [Michael Geary]
+* Fixed that rails integration would call filter with the wrong "self" [Michael Geary]
 
-Fixed bad error reporting when a filter called a method which doesn't exist. Liquid told you that it couldn't find the 
-filter which was obviously misleading [Tobias Luetke]
+* Fixed bad error reporting when a filter called a method which doesn't exist. Liquid told you that it couldn't find the filter which was obviously misleading [Tobias Luetke]
 
-Removed count helper from standard lib. use size [Tobias Luetke]
+* Removed count helper from standard lib. use size [Tobias Luetke]
 
-Fixed bug with string filter parameters failing to tolerate commas in strings. [Paul Hammond]
+* Fixed bug with string filter parameters failing to tolerate commas in strings. [Paul Hammond]
 
-Improved filter parameters. Filter parameters are now context sensitive; Types are resolved according to the rules of the context. Multiple parameters are now separated by the Liquid::ArgumentSeparator: , by default [Paul Hammond]
+* Improved filter parameters. Filter parameters are now context sensitive; Types are resolved according to the rules of the context. Multiple parameters are now separated by the Liquid::ArgumentSeparator: , by default [Paul Hammond]
+	
 	{{ 'Typo' | link_to: 'http://typo.leetsoft.com', 'Typo - a modern weblog engine' }}
 	
 
-Added Liquid::Drop. A base class which you can use for exporting proxy objects to liquid which can acquire more data when used in liquid. [Tobias Luetke] 
+* Added Liquid::Drop. A base class which you can use for exporting proxy objects to liquid which can acquire more data when used in liquid. [Tobias Luetke] 
 
   class ProductDrop < Liquid::Drop
     def top_sales
@@ -37,4 +37,4 @@ Added Liquid::Drop. A base class which you can use for exporting proxy objects t
   t.render('product' => ProductDrop.new )
 
 
-Added filter parameters support. Example: {{ date | format_date: "%Y" }} [Paul Hammond]
+* Added filter parameters support. Example: {{ date | format_date: "%Y" }} [Paul Hammond]
diff --git a/History.txt b/History.txt
new file mode 100644
index 0000000..2f1c37f
--- /dev/null
+++ b/History.txt
@@ -0,0 +1,44 @@
+1.9.0 / 2008-03-04
+
+* Fixed gem install rake task
+* Improve Error encapsulation in liquid by maintaining a own set of exceptions instead of relying on ruby build ins
+
+Before 1.9.0
+
+* Added If with or / and expressions
+
+* Implemented .to_liquid for all objects which can be passed to liquid like Strings Arrays Hashes Numerics and Booleans. To export new objects to liquid just implement .to_liquid on them and return objects which themselves have .to_liquid methods. 
+
+* Added more tags to standard library
+
+* Added include tag ( like partials in rails )
+
+* [...] Gazillion of detail improvements
+
+* Added strainers as filter hosts for better security [Tobias Luetke]
+
+* Fixed that rails integration would call filter with the wrong "self" [Michael Geary]
+
+* Fixed bad error reporting when a filter called a method which doesn't exist. Liquid told you that it couldn't find the filter which was obviously misleading [Tobias Luetke]
+
+* Removed count helper from standard lib. use size [Tobias Luetke]
+
+* Fixed bug with string filter parameters failing to tolerate commas in strings. [Paul Hammond]
+
+* Improved filter parameters. Filter parameters are now context sensitive; Types are resolved according to the rules of the context. Multiple parameters are now separated by the Liquid::ArgumentSeparator: , by default [Paul Hammond]
+	
+	{{ 'Typo' | link_to: 'http://typo.leetsoft.com', 'Typo - a modern weblog engine' }}
+	
+
+* Added Liquid::Drop. A base class which you can use for exporting proxy objects to liquid which can acquire more data when used in liquid. [Tobias Luetke] 
+
+  class ProductDrop < Liquid::Drop
+    def top_sales
+       Shop.current.products.find(:all, :order => 'sales', :limit => 10 )
+    end
+  end   
+  t = Liquid::Template.parse( ' {% for product in product.top_sales %} {{ product.name }} {% endfor %} '  )
+  t.render('product' => ProductDrop.new )
+
+
+* Added filter parameters support. Example: {{ date | format_date: "%Y" }} [Paul Hammond]
diff --git a/Manifest.txt b/Manifest.txt
index 2941b97..4578546 100644
--- a/Manifest.txt
+++ b/Manifest.txt
@@ -1,7 +1,8 @@
 CHANGELOG
+History.txt
 MIT-LICENSE
 Manifest.txt
-README
+README.txt
 Rakefile
 example/server/example_servlet.rb
 example/server/liquid_servlet.rb
@@ -20,6 +21,7 @@ lib/liquid/errors.rb
 lib/liquid/extensions.rb
 lib/liquid/file_system.rb
 lib/liquid/htmltags.rb
+lib/liquid/module_ex.rb
 lib/liquid/standardfilters.rb
 lib/liquid/strainer.rb
 lib/liquid/tag.rb
@@ -36,6 +38,7 @@ lib/liquid/tags/unless.rb
 lib/liquid/template.rb
 lib/liquid/variable.rb
 test/block_test.rb
+test/condition_test.rb
 test/context_test.rb
 test/drop_test.rb
 test/error_handling_test.rb
@@ -47,6 +50,7 @@ test/helper.rb
 test/html_tag_test.rb
 test/if_else_test.rb
 test/include_tag_test.rb
+test/module_ex_test.rb
 test/output_test.rb
 test/parsing_quirks_test.rb
 test/regexp_test.rb
@@ -56,5 +60,6 @@ test/standard_tag_test.rb
 test/statements_test.rb
 test/strainer_test.rb
 test/template_test.rb
+test/test_helper.rb
 test/unless_else_test.rb
 test/variable_test.rb
diff --git a/README b/README.txt
similarity index 100%
rename from README
rename to README.txt
diff --git a/Rakefile b/Rakefile
index 1c6df69..a2057ac 100755
--- a/Rakefile
+++ b/Rakefile
@@ -3,7 +3,7 @@ require 'rubygems'
 require 'rake'
 require 'hoe'
 
-PKG_VERSION = "1.7.0"
+PKG_VERSION = "1.9.0"
 PKG_NAME    = "liquid"
 PKG_DESC    = "A secure non evaling end user template engine with aesthetic markup."
 
@@ -17,8 +17,8 @@ end
 Hoe.new(PKG_NAME, PKG_VERSION) do |p|
   p.rubyforge_name = PKG_NAME
   p.summary        = PKG_DESC
-  p.description    = nil
+  p.description    = PKG_DESC
   p.author         = "Tobias Luetke"
   p.email          = "tobi@leetsoft.com"
-  p.url            = "http://home.leetsoft.com/liquid"    
+  p.url            = "http://www.liquidmarkup.org"    
 end
\ No newline at end of file
diff --git a/lib/liquid/condition.rb b/lib/liquid/condition.rb
index b57cfc6..ac30f74 100644
--- a/lib/liquid/condition.rb
+++ b/lib/liquid/condition.rb
@@ -96,7 +96,7 @@ module Liquid
       left, right = context[left], context[right]
             
 
-      operation = self.class.operators[op] || raise(ArgumentError.new("Error in tag '#{name}' - Unknown operator #{op}"))
+      operation = self.class.operators[op] || raise(ArgumentError.new("Unknown operator #{op}"))
 
       if operation.respond_to?(:call)
         operation.call(self, left, right)
diff --git a/lib/liquid/context.rb b/lib/liquid/context.rb
index abcca59..4cfbb24 100644
--- a/lib/liquid/context.rb
+++ b/lib/liquid/context.rb
@@ -1,8 +1,5 @@
 module Liquid
   
-  class ContextError < StandardError
-  end
-  
   # Context keeps the variable stack and resolves variables, as well as keywords
   #
   #   context['variable'] = 'testing'
diff --git a/lib/liquid/errors.rb b/lib/liquid/errors.rb
index 4e493b8..0d0343b 100644
--- a/lib/liquid/errors.rb
+++ b/lib/liquid/errors.rb
@@ -1,7 +1,10 @@
 module Liquid
-  class FilterNotFound < StandardError
-  end
-
-  class FileSystemError < StandardError
-  end
+  class Error < ::StandardError; end
+  
+  class ArgumentError < Error; end
+  class ContextError < Error; end
+  class FilterNotFound < Error; end
+  class FileSystemError < Error; end
+  class StandardError < Error; end
+  class SyntaxError < Error; end
 end
\ No newline at end of file
diff --git a/lib/liquid/strainer.rb b/lib/liquid/strainer.rb
index 8106894..7ef5e02 100644
--- a/lib/liquid/strainer.rb
+++ b/lib/liquid/strainer.rb
@@ -24,7 +24,7 @@ module Liquid
     end
               
     def self.global_filter(filter)
-      raise StandardError, "Passed filter is not a module" unless filter.is_a?(Module)
+      raise ArgumentError, "Passed filter is not a module" unless filter.is_a?(Module)
       @@filters[filter.name] = filter
     end
     
diff --git a/test/error_handling_test.rb b/test/error_handling_test.rb
index 3fbb27f..515f642 100644
--- a/test/error_handling_test.rb
+++ b/test/error_handling_test.rb
@@ -4,15 +4,15 @@ require File.dirname(__FILE__) + '/helper'
 
 class ErrorDrop < Liquid::Drop
   def standard_error
-    raise StandardError, 'standard error'
+    raise Liquid::StandardError, 'standard error'
   end  
 
   def argument_error
-    raise ArgumentError, 'argument error'
+    raise Liquid::ArgumentError, 'argument error'
   end  
   
   def syntax_error
-    raise SyntaxError, 'syntax error'
+    raise Liquid::SyntaxError, 'syntax error'
   end  
   
 end
@@ -59,6 +59,19 @@ class ErrorHandlingTest < Test::Unit::TestCase
     
   end
   
+  def test_unrecognized_operator
+    
+    assert_nothing_raised do
+      
+      template = Liquid::Template.parse(' {% if 1 =! 2 %}ok{% endif %} ')
+      assert_equal ' Liquid error: Unknown operator =! ', template.render
+      
+      assert_equal 1, template.errors.size
+      assert_equal Liquid::ArgumentError, template.errors.first.class
+      
+    end
+    
+  end
   
 end