Flush after every socket write. Nil out @socket earlier during close. Bumped patch version number.

lib/mongo/db.rb

@@ -288,8 +288,11 @@ module XGen
 
         # Close the connection to the database.
         def close
-          @socket.close if @socket
-          @socket = nil
+          if @socket
+            s = @socket
+            @socket = nil
+            s.close
+          end
         end
 
         def connected?
@@ -426,6 +429,7 @@ module XGen
           connect_to_master if !connected? && @auto_reconnect
           begin
             @socket.print(message.buf.to_s)
+            @socket.flush
           rescue => ex
             close
             raise ex

mongo-ruby-driver.gemspec

@@ -1,6 +1,6 @@
 Gem::Specification.new do |s|
   s.name = 'mongo'
-  s.version = '0.5.1'
+  s.version = '0.5.2'
   s.platform = Gem::Platform::RUBY
   s.summary = 'Simple pure-Ruby driver for the 10gen Mongo DB'
   s.description = 'A pure-Ruby driver for the 10gen Mongo DB. For more information about Mongo, see http://www.mongodb.org.'