diff --git a/couchrest.gemspec b/couchrest.gemspec
index 30e727f..04130cc 100644
--- a/couchrest.gemspec
+++ b/couchrest.gemspec
@@ -2,7 +2,7 @@
 
 Gem::Specification.new do |s|
   s.name = %q{couchrest}
-  s.version = "0.15"
+  s.version = "0.16"
 
   s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
   s.authors = ["J. Chris Anderson", "Matt Aimonetti"]
diff --git a/lib/couchrest.rb b/lib/couchrest.rb
index af40a0b..7b77e6a 100644
--- a/lib/couchrest.rb
+++ b/lib/couchrest.rb
@@ -27,13 +27,13 @@ require 'couchrest/monkeypatches'
 
 # = CouchDB, close to the metal
 module CouchRest
-  VERSION = '0.15'
+  VERSION = '0.16' unless self.const_defined?("VERSION")
   
   autoload :Server,       'couchrest/core/server'
   autoload :Database,     'couchrest/core/database'
-  autoload :Response,      'couchrest/core/response'
+  autoload :Response,     'couchrest/core/response'
   autoload :Document,     'couchrest/core/document'
-  autoload :Design,     'couchrest/core/design'
+  autoload :Design,       'couchrest/core/design'
   autoload :View,         'couchrest/core/view'
   autoload :Model,        'couchrest/core/model'
   autoload :Pager,        'couchrest/helper/pager'
diff --git a/lib/couchrest/core/server.rb b/lib/couchrest/core/server.rb
index 8d39998..2f46f86 100644
--- a/lib/couchrest/core/server.rb
+++ b/lib/couchrest/core/server.rb
@@ -79,7 +79,7 @@ module CouchRest
     def next_uuid(count = @uuid_batch_count)
       @uuids ||= []
       if @uuids.empty?
-        @uuids = CouchRest.post("#{@uri}/_uuids?count=#{count}")["uuids"]
+        @uuids = CouchRest.get("#{@uri}/_uuids?count=#{count}")["uuids"]
       end
       @uuids.pop
     end
diff --git a/lib/couchrest/mixins/callbacks.rb b/lib/couchrest/mixins/callbacks.rb
index 3299d0a..28eca50 100644
--- a/lib/couchrest/mixins/callbacks.rb
+++ b/lib/couchrest/mixins/callbacks.rb
@@ -325,7 +325,7 @@ module CouchRest
     end
         
     module ClassMethods
-      CHAINS = {:before => :before, :around => :before, :after => :after}
+      CHAINS = {:before => :before, :around => :before, :after => :after} unless self.const_defined?("CHAINS")
       
       # Make the _run_save_callbacks method. The generated method takes
       # a block that it'll yield to. It'll call the before and around filters
diff --git a/lib/couchrest/mixins/extended_attachments.rb b/lib/couchrest/mixins/extended_attachments.rb
index 009abf7..278bc2b 100644
--- a/lib/couchrest/mixins/extended_attachments.rb
+++ b/lib/couchrest/mixins/extended_attachments.rb
@@ -14,7 +14,7 @@ module CouchRest
 
       # reads the data from an attachment
       def read_attachment(attachment_name)
-        Base64.decode64(database.fetch_attachment(self.id, attachment_name))
+        Base64.decode64(database.fetch_attachment(self, attachment_name))
       end
 
       # modifies a file attachment on the current doc
diff --git a/lib/couchrest/more/extended_document.rb b/lib/couchrest/more/extended_document.rb
index 95d5d19..ceb78cb 100644
--- a/lib/couchrest/more/extended_document.rb
+++ b/lib/couchrest/more/extended_document.rb
@@ -1,4 +1,5 @@
 begin
+  # still required for Time parsing and pluralization in the validation
   require 'extlib'
 rescue 
   puts "CouchRest::ExtendedDocument still requires extlib (not for much longer). This is left out of the gemspec on purpose."
diff --git a/spec/couchrest/core/database_spec.rb b/spec/couchrest/core/database_spec.rb
index 4a83b57..18711ef 100644
--- a/spec/couchrest/core/database_spec.rb
+++ b/spec/couchrest/core/database_spec.rb
@@ -247,9 +247,11 @@ describe CouchRest::Database do
       @db.save_doc(@doc)
     end
     
-    it "should get the attachment with the doc's _id" do
-      @db.fetch_attachment("mydocwithattachment", "test.html").should == @attach
-    end
+    # Depreacated
+    # it "should get the attachment with the doc's _id" do
+    #   @db.fetch_attachment("mydocwithattachment", "test.html").should == @attach
+    # end
+    
     it "should get the attachment with the doc itself" do
       @db.fetch_attachment(@db.get('mydocwithattachment'), 'test.html').should == @attach
     end
@@ -266,7 +268,8 @@ describe CouchRest::Database do
     it "should save the attachment to a new doc" do
       r = @db.put_attachment({'_id' => 'attach-this'}, 'couchdb.png', image = @file.read, {:content_type => 'image/png'})
       r['ok'].should == true
-      attachment = @db.fetch_attachment("attach-this","couchdb.png")
+      doc = @db.get("attach-this")
+      attachment = @db.fetch_attachment(doc,"couchdb.png")
       attachment.should == image
     end
   end
@@ -274,7 +277,7 @@ describe CouchRest::Database do
   describe "PUT document with attachment" do
     before(:each) do
       @attach = "<html><head><title>My Doc</title></head><body><p>Has words.</p></body></html>"
-      @doc = {
+      doc = {
         "_id" => "mydocwithattachment",
         "field" => ["some value"],
         "_attachments" => {
@@ -284,14 +287,14 @@ describe CouchRest::Database do
           }
         }
       }
-      @db.save_doc(@doc)
+      @db.save_doc(doc)
+      @doc = @db.get("mydocwithattachment")
     end
     it "should save and be indicated" do
-      doc = @db.get("mydocwithattachment")
-      doc['_attachments']['test.html']['length'].should == @attach.length
+      @doc['_attachments']['test.html']['length'].should == @attach.length
     end
     it "should be there" do
-      attachment = @db.fetch_attachment("mydocwithattachment","test.html")
+      attachment = @db.fetch_attachment(@doc,"test.html")
       attachment.should == @attach
     end
   end
@@ -309,14 +312,14 @@ describe CouchRest::Database do
         }
       }
       @db.save_doc(doc)
-      doc = @db.get('mydocwithattachment')
       doc['field'] << 'another value'
-      @db.save_doc(doc)
+      @db.save_doc(doc).should be_true
     end
     
     it 'should be there' do
-      attachment = @db.fetch_attachment('mydocwithattachment', 'test.html')
-      attachment.should == @attach
+      doc = @db.get('mydocwithattachment')
+      attachment = @db.fetch_attachment(doc, 'test.html')
+      Base64.decode64(attachment).should == @attach
     end
   end
 
@@ -339,18 +342,18 @@ describe CouchRest::Database do
         }
       }
       @db.save_doc(@doc)
+      @doc = @db.get("mydocwithattachment")
     end
     it "should save and be indicated" do
-      doc = @db.get("mydocwithattachment")
-      doc['_attachments']['test.html']['length'].should == @attach.length
-      doc['_attachments']['other.html']['length'].should == @attach2.length
+      @doc['_attachments']['test.html']['length'].should == @attach.length
+      @doc['_attachments']['other.html']['length'].should == @attach2.length
     end
     it "should be there" do
-      attachment = @db.fetch_attachment("mydocwithattachment","test.html")
+      attachment = @db.fetch_attachment(@doc,"test.html")
       attachment.should == @attach
     end
     it "should be there" do
-      attachment = @db.fetch_attachment("mydocwithattachment","other.html")
+      attachment = @db.fetch_attachment(@doc,"other.html")
       attachment.should == @attach2
     end
   end
@@ -370,9 +373,9 @@ describe CouchRest::Database do
       @doc = @db.get('mydocwithattachment')
     end
     it "should delete the attachment" do
-      lambda { @db.fetch_attachment('mydocwithattachment','test.html') }.should_not raise_error
+      lambda { @db.fetch_attachment(@doc,'test.html') }.should_not raise_error
       @db.delete_attachment(@doc, "test.html")
-      lambda { @db.fetch_attachment('mydocwithattachment','test.html') }.should raise_error(RestClient::ResourceNotFound)
+      lambda { @db.fetch_attachment(@doc,'test.html') }.should raise_error(RestClient::ResourceNotFound)
     end
   end
 
@@ -395,7 +398,8 @@ describe CouchRest::Database do
       doc['_attachments']['http://example.com/stuff.cgi?things=and%20stuff']['length'].should == @attach.length
     end
     it "should be there" do
-      attachment = @db.fetch_attachment(@docid,"http://example.com/stuff.cgi?things=and%20stuff")
+      doc = @db.get(@docid)
+      attachment = @db.fetch_attachment(doc,"http://example.com/stuff.cgi?things=and%20stuff")
       attachment.should == @attach
     end
   end
@@ -737,4 +741,4 @@ describe CouchRest::Database do
   end
 
 
-end
+end
\ No newline at end of file
diff --git a/spec/couchrest/more/extended_doc_spec.rb b/spec/couchrest/more/extended_doc_spec.rb
index fadb676..f36394a 100644
--- a/spec/couchrest/more/extended_doc_spec.rb
+++ b/spec/couchrest/more/extended_doc_spec.rb
@@ -439,12 +439,10 @@ describe "ExtendedDocument" do
       result.should == true
     end
     it "should be resavable" do
-      pending "TO FIX" do
-        @dobj.destroy
-        @dobj.rev.should be_nil
-        @dobj.id.should be_nil
-        @dobj.save.should == true
-      end
+      @dobj.destroy
+      @dobj.rev.should be_nil
+      @dobj.id.should be_nil
+      @dobj.save.should == true
     end
     it "should make it go away" do
       @dobj.destroy
diff --git a/spec/fixtures/more/article.rb b/spec/fixtures/more/article.rb
new file mode 100644
index 0000000..02b7944
--- /dev/null
+++ b/spec/fixtures/more/article.rb
@@ -0,0 +1,34 @@
+class Article < CouchRest::ExtendedDocument
+  use_database TEST_SERVER.default_database
+  unique_id :slug
+  
+  view_by :date, :descending => true
+  view_by :user_id, :date
+    
+  view_by :tags,
+    :map => 
+      "function(doc) {
+        if (doc['couchrest-type'] == 'Article' && doc.tags) {
+          doc.tags.forEach(function(tag){
+            emit(tag, 1);
+          });
+        }
+      }",
+    :reduce => 
+      "function(keys, values, rereduce) {
+        return sum(values);
+      }"  
+
+  property :date
+  property :slug, :read_only => true
+  property :title
+  property :tags
+
+  timestamps!
+  
+  save_callback :before, :generate_slug_from_title
+  
+  def generate_slug_from_title
+    self['slug'] = title.downcase.gsub(/[^a-z0-9]/,'-').squeeze('-').gsub(/^\-|\-$/,'') if new_document?
+  end
+end
\ No newline at end of file
diff --git a/spec/fixtures/more/course.rb b/spec/fixtures/more/course.rb
new file mode 100644
index 0000000..b639d34
--- /dev/null
+++ b/spec/fixtures/more/course.rb
@@ -0,0 +1,14 @@
+require File.join(FIXTURE_PATH, 'more', 'question')
+require File.join(FIXTURE_PATH, 'more', 'person')
+
+class Course < CouchRest::ExtendedDocument
+  use_database TEST_SERVER.default_database
+  
+  property :title
+  property :questions,      :cast_as => ['Question']
+  property :professor,      :cast_as => 'Person'
+  property :final_test_at,  :cast_as => 'Time'
+  
+  view_by :title
+  view_by :dept, :ducktype => true
+end
\ No newline at end of file
diff --git a/spec/fixtures/more/event.rb b/spec/fixtures/more/event.rb
new file mode 100644
index 0000000..c36527a
--- /dev/null
+++ b/spec/fixtures/more/event.rb
@@ -0,0 +1,6 @@
+class Event < CouchRest::ExtendedDocument
+  use_database TEST_SERVER.default_database
+  
+  property :subject
+  property :occurs_at, :cast_as => 'Time', :send => 'parse'
+end
\ No newline at end of file
diff --git a/spec/fixtures/more/person.rb b/spec/fixtures/more/person.rb
new file mode 100644
index 0000000..ddc1bfd
--- /dev/null
+++ b/spec/fixtures/more/person.rb
@@ -0,0 +1,8 @@
+class Person < Hash
+  include ::CouchRest::CastedModel
+  property :name
+  
+  def last_name
+    name.last
+  end
+end
\ No newline at end of file
diff --git a/spec/fixtures/more/question.rb b/spec/fixtures/more/question.rb
new file mode 100644
index 0000000..bec7803
--- /dev/null
+++ b/spec/fixtures/more/question.rb
@@ -0,0 +1,6 @@
+class Question < Hash
+  include ::CouchRest::CastedModel
+  
+  property :q
+  property :a
+end
\ No newline at end of file