... wait for it ...

features/step_definitions/web_steps.rb

@@ -195,6 +195,10 @@ end
 
 Then /^(?:|I )should be on (.+)$/ do |page_name|
   current_path = URI.parse(current_url).path
+  wait_until(3) do
+    current_path = path_to(page_name)
+  end
+
   if current_path.respond_to? :should
     current_path.should == path_to(page_name)
   else