diff --git a/activerecord/CHANGELOG b/activerecord/CHANGELOG
index 2de7f35a64e7d387285a6472ffc96ec4f051f3ad..855ea9cfbc62bdc7a2ed7afbc9da6f695d38125f 100644
--- a/activerecord/CHANGELOG
+++ b/activerecord/CHANGELOG
@@ -1,5 +1,7 @@
 *SVN*
 
+* Fixed a bug in the Ruby/MySQL that caused binary content to be escaped badly and come back mangled #405 [Tobias Luetke]
+
 * Added block-style for callbacks #332 [bitsweat].
 
     Before:
diff --git a/activerecord/lib/active_record/vendor/mysql.rb b/activerecord/lib/active_record/vendor/mysql.rb
index 4970f77bd383dba3248f49caf676a17d67ca68b5..84f5d2533c9455869dce781ee338679ea356715e 100644
--- a/activerecord/lib/active_record/vendor/mysql.rb
+++ b/activerecord/lib/active_record/vendor/mysql.rb
@@ -1091,7 +1091,7 @@ def escape_string(str)
       when "\0" then "\\0"
       when "\n" then "\\n"
       when "\r" then "\\r"
-      when "\032" then "\Z"
+      when "\032" then "\\Z"
       else "\\"+$1
       end
     end
diff --git a/activerecord/test/binary_test.rb b/activerecord/test/binary_test.rb
new file mode 100644
index 0000000000000000000000000000000000000000..b63fbbaede7b1eb3cbe6808d8362e4ce2e77d827
--- /dev/null
+++ b/activerecord/test/binary_test.rb
@@ -0,0 +1,37 @@
+require 'abstract_unit'
+require 'fixtures/binary'
+
+class BinaryTest < Test::Unit::TestCase
+  def setup
+    @data = create_data_fixture
+  end
+  
+  def test_load_save
+    bin = Binary.new
+    bin.data = @data
+
+    assert bin.data == @data,
+      "Assigned data differs from file data"
+        
+    bin.save
+
+    assert bin.data == @data,
+      "Assigned data differs from file data after save"
+
+    db_bin = Binary.find(bin.id)
+
+    assert db_bin.data == bin.data,
+      "Loaded binary data differes from memory version"
+    
+    assert db_bin.data == File.new(File.dirname(__FILE__)+"/fixtures/associations.png","rb").read, 
+      "Loaded binary data differes from file version"
+  end
+  
+  private
+  
+  def create_data_fixture
+    Binary.connection.execute("DELETE FROM binaries")
+    File.new(File.dirname(__FILE__)+"/fixtures/associations.png","rb").read
+  end
+  
+end
\ No newline at end of file
diff --git a/activerecord/test/fixtures/associations.png b/activerecord/test/fixtures/associations.png
new file mode 100644
index 0000000000000000000000000000000000000000..661c7a8bbc87282503dc6984a1d9a6161c36f900
Binary files /dev/null and b/activerecord/test/fixtures/associations.png differ
diff --git a/activerecord/test/fixtures/binary.rb b/activerecord/test/fixtures/binary.rb
new file mode 100644
index 0000000000000000000000000000000000000000..950c45919999176822d5ab8530913562571d35eb
--- /dev/null
+++ b/activerecord/test/fixtures/binary.rb
@@ -0,0 +1,2 @@
+class Binary < ActiveRecord::Base
+end
\ No newline at end of file
diff --git a/activerecord/test/fixtures/db_definitions/mysql.sql b/activerecord/test/fixtures/db_definitions/mysql.sql
index ec27a524452cc05b69ed13a1a4c809f508fec193..3758f19bfa9afe0ed0b5e9426109f0867e8b5a8a 100755
--- a/activerecord/test/fixtures/db_definitions/mysql.sql
+++ b/activerecord/test/fixtures/db_definitions/mysql.sql
@@ -115,4 +115,10 @@ CREATE TABLE `people` (
   `id` INTEGER NOT NULL PRIMARY KEY,
   `first_name` VARCHAR(40) NOT NULL,
   `lock_version` INTEGER NOT NULL DEFAULT 0
+);
+
+CREATE TABLE `binaries` (
+  `id` int(11) NOT NULL auto_increment,
+  `data` mediumblob,
+  PRIMARY KEY  (`id`)
 );
\ No newline at end of file
diff --git a/activerecord/test/fixtures/db_definitions/postgresql.sql b/activerecord/test/fixtures/db_definitions/postgresql.sql
index 6d8222cfd6001b334f8a72813b8da355590feae5..8f6587f96166f90c1054a9b4bafb902efbde1621 100644
--- a/activerecord/test/fixtures/db_definitions/postgresql.sql
+++ b/activerecord/test/fixtures/db_definitions/postgresql.sql
@@ -133,4 +133,10 @@ CREATE TABLE people (
   first_name text,
   lock_version integer default 0,
   PRIMARY KEY  (id)
+);
+
+CREATE TABLE binaries ( 
+  id serial , 
+  data bytea,
+  PRIMARY KEY (id)
 );
\ No newline at end of file
diff --git a/activerecord/test/fixtures/db_definitions/sqlite.sql b/activerecord/test/fixtures/db_definitions/sqlite.sql
index 5c27832056150c410ea5a7c29865a002405d5762..65b24a9333a293de0198f054ccc5bd01690baa31 100644
--- a/activerecord/test/fixtures/db_definitions/sqlite.sql
+++ b/activerecord/test/fixtures/db_definitions/sqlite.sql
@@ -103,4 +103,9 @@ CREATE TABLE 'people' (
   'id' INTEGER NOT NULL PRIMARY KEY,
   'first_name' VARCHAR(40) DEFAULT NULL,
   'lock_version' INTEGER NOT NULL DEFAULT 0
+);
+
+CREATE TABLE 'binaries' (
+  'id' INTEGER NOT NULL PRIMARY KEY,
+  'data' BLOB DEFAULT NULL
 );
\ No newline at end of file
diff --git a/activerecord/test/fixtures/db_definitions/sqlserver.sql b/activerecord/test/fixtures/db_definitions/sqlserver.sql
index 74cd381ba3d41653f1ff06d611fc7dd64c4c16c1..023ab634068014f47dc116804c6f47c92ad343ff 100644
--- a/activerecord/test/fixtures/db_definitions/sqlserver.sql
+++ b/activerecord/test/fixtures/db_definitions/sqlserver.sql
@@ -109,10 +109,17 @@ CREATE TABLE mixins (
   PRIMARY KEY (id)    
 );
 
-
 CREATE TABLE people (
   id int NOT NULL IDENTITY(1, 1),
   first_name varchar(40) NULL,
   lock_version int default 0,
   PRIMARY KEY (id)
-);
\ No newline at end of file
+);
+
+CREATE TABLE binaries (
+  id int NOT NULL IDENTITY(1, 1),
+  data blob NULL,
+  PRIMARY KEY (id)
+);
+
+