diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4bcb850d2..bef698d4c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+# 0.4.2
+
+* Fixed incompatibility with Ruby 1.8.7
+
 # 0.4.1
 
 * Fixed ancestor checking issue when assigning Autoparse identifiers
diff --git a/google-api-client.gemspec b/google-api-client.gemspec
index f5e44586e..33db9b052 100644
--- a/google-api-client.gemspec
+++ b/google-api-client.gemspec
@@ -2,11 +2,11 @@
 
 Gem::Specification.new do |s|
   s.name = "google-api-client"
-  s.version = "0.4.1"
+  s.version = "0.4.2"
 
   s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
   s.authors = ["Bob Aman"]
-  s.date = "2012-02-10"
+  s.date = "2012-02-22"
   s.description = "The Google API Ruby Client makes it trivial to discover and access supported\nAPIs.\n"
   s.email = "bobaman@google.com"
   s.executables = ["google-api"]
diff --git a/lib/google/api_client.rb b/lib/google/api_client.rb
index ba7c1f7b7..355f825b5 100644
--- a/lib/google/api_client.rb
+++ b/lib/google/api_client.rb
@@ -47,8 +47,6 @@ module Google
     #     <li><code>:oauth_1</code></li>
     #     <li><code>:oauth_2</code></li>
     #   </ul>
-    # @option options [String] :host ("www.googleapis.com")
-    #   The API hostname used by the client.  This rarely needs to be changed.
     # @option options [String] :application_name
     #   The name of the application using the client.
     # @option options [String] :application_version
@@ -57,6 +55,12 @@ module Google
     #   ("{app_name} google-api-ruby-client/{version} {os_name}/{os_version}")
     #   The user agent used by the client.  Most developers will want to
     #   leave this value alone and use the `:application_name` option instead.
+    # @option options [String] :host ("www.googleapis.com")
+    #   The API hostname used by the client. This rarely needs to be changed.
+    # @option options [String] :port (443)
+    #   The port number used by the client. This rarely needs to be changed.
+    # @option options [String] :discovery_path ("/discovery/v1")
+    #   The discovery base path. This rarely needs to be changed.
     def initialize(options={})
       # Normalize key to String to allow indifferent access.
       options = options.inject({}) do |accu, (key, value)|
@@ -65,6 +69,9 @@ module Google
       end
       # Almost all API usage will have a host of 'www.googleapis.com'.
       self.host = options["host"] || 'www.googleapis.com'
+      self.port = options["port"] || 443
+      self.discovery_path = options["discovery_path"] || '/discovery/v1'
+
       # Most developers will want to leave this value alone and use the
       # application_name option.
       application_string = (
@@ -80,7 +87,7 @@ module Google
       ).strip
       # The writer method understands a few Symbols and will generate useful
       # default authentication mechanisms.
-      self.authorization = options["authorization"] || :oauth_2
+      self.authorization = options.key?("authorization") ? options["authorization"] : :oauth_2
       self.key = options["key"]
       self.user_ip = options["user_ip"]
       @discovery_uris = {}
@@ -160,13 +167,6 @@ module Google
     # @return [String] The user's IP address.
     attr_accessor :user_ip
 
-    ##
-    # The API hostname used by the client.
-    #
-    # @return [String]
-    #   The API hostname.  Should almost always be 'www.googleapis.com'.
-    attr_accessor :host
-
     ##
     # The user agent used by the client.
     #
@@ -174,15 +174,58 @@ module Google
     #   The user agent string used in the User-Agent header.
     attr_accessor :user_agent
 
+    ##
+    # The API hostname used by the client.
+    #
+    # @return [String]
+    #   The API hostname. Should almost always be 'www.googleapis.com'.
+    attr_accessor :host
+
+    ##
+    # The port number used by the client.
+    #
+    # @return [String]
+    #   The port number. Should almost always be 443.
+    attr_accessor :port
+
+    ##
+    # The base path used by the client for discovery.
+    #
+    # @return [String]
+    #   The base path. Should almost always be '/discovery/v1'.
+    attr_accessor :discovery_path
+
+    ##
+    # Resolves a URI template against the client's configured base.
+    #
+    # @param [String, Addressable::URI, Addressable::Template] template
+    #   The template to resolve.
+    # @param [Hash] mapping The mapping that corresponds to the template.
+    # @return [Addressable::URI] The expanded URI.
+    def resolve_uri(template, mapping={})
+      @base_uri ||= Addressable::URI.new(
+        :scheme => 'https',
+        :host => self.host,
+        :port => self.port
+      ).normalize
+      template = if template.kind_of?(Addressable::Template)
+        template.pattern
+      elsif template.respond_to?(:to_str)
+        template.to_str
+      else
+        raise TypeError,
+          "Expected String, Addressable::URI, or Addressable::Template, " +
+          "got #{template.class}."
+      end
+      return Addressable::Template.new(@base_uri + template).expand(mapping)
+    end
+
     ##
     # Returns the URI for the directory document.
     #
     # @return [Addressable::URI] The URI of the directory document.
     def directory_uri
-      template = Addressable::Template.new(
-        "https://{host}/discovery/v1/apis"
-      )
-      return template.expand({"host" => self.host})
+      return resolve_uri(self.discovery_path + '/apis')
     end
 
     ##
@@ -207,17 +250,13 @@ module Google
     def discovery_uri(api, version=nil)
       api = api.to_s
       version = version || 'v1'
-      return @discovery_uris["#{api}:#{version}"] ||= (begin
-        template = Addressable::Template.new(
-          "https://{host}/discovery/v1/apis/" +
-          "{api}/{version}/rest"
+      return @discovery_uris["#{api}:#{version}"] ||= (
+        resolve_uri(
+          self.discovery_path + '/apis/{api}/{version}/rest',
+          'api' => api,
+          'version' => version
         )
-        template.expand({
-          "host" => self.host,
-          "api" => api,
-          "version" => version
-        })
-      end)
+      )
     end
 
     ##
@@ -596,7 +635,7 @@ module Google
         unless headers.kind_of?(Enumerable)
           # We need to use some Enumerable methods, relying on the presence of
           # the #each method.
-          class <<headers
+          class << headers
             include Enumerable
           end
         end
diff --git a/lib/google/api_client/discovery/api.rb b/lib/google/api_client/discovery/api.rb
index db5e97ea7..53d5ee6d1 100644
--- a/lib/google/api_client/discovery/api.rb
+++ b/lib/google/api_client/discovery/api.rb
@@ -43,7 +43,7 @@ module Google
       def initialize(document_base, discovery_document)
         @document_base = Addressable::URI.parse(document_base)
         @discovery_document = discovery_document
-        metaclass = (class <<self; self; end)
+        metaclass = (class << self; self; end)
         self.discovered_resources.each do |resource|
           method_name = Google::INFLECTOR.underscore(resource.name).to_sym
           if !self.respond_to?(method_name)
diff --git a/lib/google/api_client/discovery/schema.rb b/lib/google/api_client/discovery/schema.rb
index f3499ebdc..eebf7dddb 100644
--- a/lib/google/api_client/discovery/schema.rb
+++ b/lib/google/api_client/discovery/schema.rb
@@ -47,8 +47,13 @@ module Google
           # and excess object creation, but this hopefully shouldn't be an
           # issue since it should only be called only once per schema per
           # process.
-          if data.kind_of?(Hash) && data['$ref']
-            reference = data['$ref']
+          if data.kind_of?(Hash) &&
+              data['$ref'] && !data['$ref'].kind_of?(Hash)
+            if data['$ref'].respond_to?(:to_str)
+              reference = data['$ref'].to_str
+            else
+              raise TypeError, "Expected String, got #{data['$ref'].class}"
+            end
             reference = '#' + reference if reference[0..0] != '#'
             data.merge({
               '$ref' => reference
@@ -74,22 +79,26 @@ module Google
             Google::INFLECTOR.camelize(api.name)
           api_version_string =
             Google::INFLECTOR.camelize(api.version).gsub('.', '_')
-          if Google::APIClient::Schema.const_defined?(api_name_string, false)
+          # This is for compatibility with Ruby 1.8.7.
+          # TODO(bobaman) Remove this when we eventually stop supporting 1.8.7.
+          args = []
+          args << false if Class.method(:const_defined?).arity != 1
+          if Google::APIClient::Schema.const_defined?(api_name_string, *args)
             api_name = Google::APIClient::Schema.const_get(
-              api_name_string, false
+              api_name_string, *args
             )
           else
             api_name = Google::APIClient::Schema.const_set(
               api_name_string, Module.new
             )
           end
-          if api_name.const_defined?(api_version_string, false)
-            api_version = api_name.const_get(api_version_string, false)
+          if api_name.const_defined?(api_version_string, *args)
+            api_version = api_name.const_get(api_version_string, *args)
           else
             api_version = api_name.const_set(api_version_string, Module.new)
           end
-          if api_version.const_defined?(schema_name, false)
-            schema_class = api_version.const_get(schema_name, false)
+          if api_version.const_defined?(schema_name, *args)
+            schema_class = api_version.const_get(schema_name, *args)
           end
         end
 
diff --git a/lib/google/api_client/environment.rb b/lib/google/api_client/environment.rb
index e5abe9334..9faa28f7d 100644
--- a/lib/google/api_client/environment.rb
+++ b/lib/google/api_client/environment.rb
@@ -16,15 +16,19 @@
 module Google
   class APIClient
     module ENV
-      OS_VERSION = if RUBY_PLATFORM =~ /mswin|win32|mingw|bccwin|cygwin/
-        # TODO(bobaman)
-        # Confirm that all of these Windows environments actually have access
-        # to the `ver` command.
-        `ver`.sub(/\s*\[Version\s*/, '/').sub(']', '').strip
-      elsif RUBY_PLATFORM =~ /darwin/i
-        "Mac OS X/#{`sw_vers -productVersion`}"
-      else
-        `uname -sr`.sub(' ', '/')
+      OS_VERSION = begin
+        if RUBY_PLATFORM =~ /mswin|win32|mingw|bccwin|cygwin/
+          # TODO(bobaman)
+          # Confirm that all of these Windows environments actually have access
+          # to the `ver` command.
+          `ver`.sub(/\s*\[Version\s*/, '/').sub(']', '').strip
+        elsif RUBY_PLATFORM =~ /darwin/i
+          "Mac OS X/#{`sw_vers -productVersion`}"
+        else
+          `uname -sr`.sub(' ', '/')
+        end
+      rescue Exception
+        RUBY_PLATFORM
       end
     end
   end
diff --git a/lib/google/api_client/version.rb b/lib/google/api_client/version.rb
index 38e2ec5d4..133ed3c00 100644
--- a/lib/google/api_client/version.rb
+++ b/lib/google/api_client/version.rb
@@ -22,7 +22,7 @@ if !defined?(::Google::APIClient::VERSION)
       module VERSION
         MAJOR = 0
         MINOR = 4
-        TINY  = 1
+        TINY  = 2
 
         STRING = [MAJOR, MINOR, TINY].join('.')
       end