diff --git a/lib/widgets/highlightable.rb b/lib/widgets/highlightable.rb
index 5cb4dc3..950cef9 100644
--- a/lib/widgets/highlightable.rb
+++ b/lib/widgets/highlightable.rb
@@ -1,80 +1,81 @@
-module Widgets
-  module Highlightable
-    def self.included(base)
-      # base.extend(ClassMethods)
-      base.class_eval do
-        include InstanceMethods
-        attr_writer :highlights
-      end
-    end
-
-    module InstanceMethods 
-      def highlights
-        @highlights ||= []
-        @highlights
-      end
-      
-      # a rule can be:
-      #  * a parameter hash eg: {:controller => 'main', :action => 'welcome'}
-      #  * a string containing an URL eg: 'http://blog.seesaw.it'
-      def highlights_on rule
-        highlights << rule
-      end
-      
-      # force the tab as highlighted
-      def highlight!
-        highlights_on proc { true }
-      end
-     
-      # takes in input a Hash (usually params)
-      # or a string/Proc that evaluates to true/false
-      # it does ignore some params like 'only_path' etc..
-      # we have to do this in orderr to support restful routes
-      def highlighted? options={}
-        option = clean_unwanted_keys(options)
-        #puts "### '#{name}'.highlighted? #{options.inspect}"
-        result = false
-       
-        highlights.each do |highlight| # for every highlight(proc or hash)
-          highlighted = true
-          if highlight.kind_of? String # do not highlight @TODO: should we evaluate the request URI for this?
-            highlighted &= false 
-          elsif highlight.kind_of? Proc # evaluate the proc
-            h = highlight.call
-            if (h.is_a?(TrueClass) || h.is_a?(FalseClass))
-              highlighted &= h
-            else
-              raise 'proc highlighting rules must evaluate to TrueClass or FalseClass'
-            end
-          elsif highlight.kind_of? Hash # evaluate the hash
-            h = clean_unwanted_keys(highlight)
-            h.each_key do |key|   # for each key
-              # remove first slash from <tt>:controller</tt> key otherwise highlighted? could fail with urls such as {:controller => "/base"</tt>
-              h_key = h[key].to_param.dup
-              h_key.gsub!(/^\//,"") if key == :controller          
-              highlighted &= h_key==options[key].to_s
-            end
-          else # highlighting rule not supported
-            raise 'highlighting rules should be String, Proc or Hash' 
-          end
-          result |= highlighted
-        end
-        return result
-      end
-      
-      private  
-      
-      # removes unwanted keys from a Hash 
-      # and returns a new hash
-      def clean_unwanted_keys(hash)
-        ignored_keys = [:only_path, :use_route]
-        hash.dup.delete_if{|key,value| ignored_keys.include?(key)}
-      end
-
-      def check_hash(param, param_name)
-        raise "param '#{param_name}' should be a Hash but is #{param.inspect}" unless param.kind_of?(Hash)
-        param
-      end
-    end
-  end
-end
+module Widgets
+  module Highlightable
+    def self.included(base)
+      # base.extend(ClassMethods)
+      base.class_eval do
+        include InstanceMethods
+        attr_writer :highlights
+      end
+    end
+
+    module InstanceMethods 
+      def highlights
+        @highlights ||= []
+        @highlights
+      end
+      
+      # a rule can be:
+      #  * a parameter hash eg: {:controller => 'main', :action => 'welcome'}
+      #  * a string containing an URL eg: 'http://blog.seesaw.it'
+      def highlights_on rule
+        highlights << rule
+      end
+      
+      # force the tab as highlighted
+      def highlight!
+        highlights_on proc { true }
+      end
+     
+      # takes in input a Hash (usually params)
+      # or a string/Proc that evaluates to true/false
+      # it does ignore some params like 'only_path' etc..
+      # we have to do this in orderr to support restful routes
+      def highlighted? options={}
+        option = clean_unwanted_keys(options)
+        #puts "### '#{name}'.highlighted? #{options.inspect}"
+        result = false
+       
+        highlights.each do |highlight| # for every highlight(proc or hash)
+          highlighted = true
+          if highlight.kind_of? String # do not highlight @TODO: should we evaluate the request URI for this?
+            highlighted &= false 
+          elsif highlight.kind_of? Proc # evaluate the proc
+            h = highlight.call
+            if (h.is_a?(TrueClass) || h.is_a?(FalseClass))
+              highlighted &= h
+            else
+              raise 'proc highlighting rules must evaluate to TrueClass or FalseClass'
+            end
+          elsif highlight.kind_of? Hash # evaluate the hash
+            h = clean_unwanted_keys(highlight)
+            h.each_key do |key|   # for each key
+              next if h[key].nil?
+              # remove first slash from <tt>:controller</tt> key otherwise highlighted? could fail with urls such as {:controller => "/base"</tt>
+              h_key = h[key].to_param.dup
+              h_key.gsub!(/^\//,"") if key == :controller          
+              highlighted &= h_key==options[key].to_s
+            end
+          else # highlighting rule not supported
+            raise 'highlighting rules should be String, Proc or Hash' 
+          end
+          result |= highlighted
+        end
+        return result
+      end
+      
+      private  
+      
+      # removes unwanted keys from a Hash 
+      # and returns a new hash
+      def clean_unwanted_keys(hash)
+        ignored_keys = [:only_path, :use_route]
+        hash.dup.delete_if{|key,value| ignored_keys.include?(key)}
+      end
+
+      def check_hash(param, param_name)
+        raise "param '#{param_name}' should be a Hash but is #{param.inspect}" unless param.kind_of?(Hash)
+        param
+      end
+    end
+  end
+end