diff --git a/cfg/conf.ini.sample b/cfg/conf.ini.sample
index 8e1204f..adf2e06 100644
--- a/cfg/conf.ini.sample
+++ b/cfg/conf.ini.sample
@@ -107,8 +107,7 @@ dir = PATH "data"
 [purge]
 ; minimum time limit between two purgings of expired pastes, it is only
 ; triggered when pastes are created
-; Set this to 0 to disable purging. Set it to run more frequently, if you are
-; running a large site.
+; Set this to 0 to run a purge every time a paste is created.
 limit = 300
 
 ; maximum amount of expired pastes to delete in one purge
diff --git a/lib/privatebin/data.php b/lib/privatebin/data.php
index 55f27c6..285c538 100644
--- a/lib/privatebin/data.php
+++ b/lib/privatebin/data.php
@@ -243,7 +243,8 @@ class privatebin_data extends privatebin_abstract
                 }
 
                 $secondKey = array_rand($secondLevel);
-                $path = self::$_dir . $firstLevel[$firstKey] . '/' . $secondLevel[$secondKey];
+                $path = self::$_dir . $firstLevel[$firstKey] .
+                    DIRECTORY_SEPARATOR . $secondLevel[$secondKey];
                 if (!is_dir($path)) continue;
                 $thirdLevel = array_filter(
                     scandir($path),
@@ -310,7 +311,8 @@ class privatebin_data extends privatebin_abstract
      */
     private static function _dataid2path($dataid)
     {
-        return self::$_dir . substr($dataid,0,2) . '/' . substr($dataid,2,2) . '/';
+        return self::$_dir . substr($dataid,0,2) . DIRECTORY_SEPARATOR .
+            substr($dataid,2,2) . DIRECTORY_SEPARATOR;
     }
 
     /**
@@ -325,7 +327,8 @@ class privatebin_data extends privatebin_abstract
      */
     private static function _dataid2discussionpath($dataid)
     {
-        return self::_dataid2path($dataid) . $dataid . '.discussion/';
+        return self::_dataid2path($dataid) . $dataid .
+            '.discussion' . DIRECTORY_SEPARATOR;
     }
 
     /**
@@ -338,7 +341,8 @@ class privatebin_data extends privatebin_abstract
      */
     private static function _isFirstLevelDir($element)
     {
-        return self::_isSecondLevelDir($element) && is_dir(self::$_dir . '/' . $element);
+        return self::_isSecondLevelDir($element) &&
+            is_dir(self::$_dir . DIRECTORY_SEPARATOR . $element);
     }
 
     /**
diff --git a/lib/privatebin/db.php b/lib/privatebin/db.php
index 08b495e..8835b4b 100644
--- a/lib/privatebin/db.php
+++ b/lib/privatebin/db.php
@@ -607,8 +607,8 @@ class privatebin_db extends privatebin_abstract
             "postdate INT$after_key );"
         );
         self::$_db->exec(
-            'CREATE INDEX parent ON ' . self::_sanitizeIdentifier('comment') .
-            '(pasteid);'
+            'CREATE INDEX IF NOT EXISTS comment_parent ON ' .
+            self::_sanitizeIdentifier('comment') . '(pasteid);'
         );
     }
 
@@ -689,14 +689,17 @@ class privatebin_db extends privatebin_abstract
                 else
                 {
                     self::$_db->exec(
-                        'CREATE UNIQUE INDEX primary ON ' . self::_sanitizeIdentifier('paste') . '(dataid);'
+                        'CREATE UNIQUE INDEX IF NOT EXISTS paste_dataid ON ' .
+                        self::_sanitizeIdentifier('paste') . '(dataid);'
                     );
                     self::$_db->exec(
-                        'CREATE UNIQUE INDEX primary ON ' . self::_sanitizeIdentifier('comment') . '(dataid);'
+                        'CREATE UNIQUE INDEX IF NOT EXISTS comment_dataid ON ' .
+                        self::_sanitizeIdentifier('comment') . '(dataid);'
                     );
                 }
                 self::$_db->exec(
-                    'CREATE INDEX parent ON ' . self::_sanitizeIdentifier('comment') . '(pasteid);'
+                    'CREATE INDEX IF NOT EXISTS comment_parent ON ' .
+                    self::_sanitizeIdentifier('comment') . '(pasteid);'
                 );
         }
     }
diff --git a/tst/model.php b/tst/model.php
index 92f8b65..42fbf52 100644
--- a/tst/model.php
+++ b/tst/model.php
@@ -8,7 +8,9 @@ class modelTest extends PHPUnit_Framework_TestCase
     public function setUp()
     {
         /* Setup Routine */
+        helper::confRestore();
         $options = parse_ini_file(CONF, true);
+        $options['purge']['limit'] = 0;
         $options['model'] = array(
             'class' => 'privatebin_db',
         );
@@ -209,6 +211,45 @@ class modelTest extends PHPUnit_Framework_TestCase
         $paste->getComment(helper::getPasteId())->delete();
     }
 
+    public function testPurge()
+    {
+        $conf = new configuration;
+        $store = privatebin_db::getInstance($conf->getSection('model_options'));
+        $store->delete(helper::getPasteId());
+        $expired = helper::getPaste(array('expire_date' => 1344803344));
+        $paste = helper::getPaste(array('expire_date' => time() + 3600));
+        $keys = array('a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'x', 'y', 'z');
+        $ids = array();
+        foreach ($keys as $key)
+        {
+            $ids[$key] = substr(md5($key), 0, 16);
+            $store->delete($ids[$key]);
+            $this->assertFalse($store->exists($ids[$key]), "paste $key does not yet exist");
+            if (in_array($key, array('x', 'y', 'z')))
+            {
+                $this->assertTrue($store->create($ids[$key], $paste), "store $key paste");
+            }
+            else
+            {
+                $this->assertTrue($store->create($ids[$key], $expired), "store $key paste");
+            }
+            $this->assertTrue($store->exists($ids[$key]), "paste $key exists after storing it");
+        }
+        $this->_model->purge(10);
+        foreach ($ids as $key => $id)
+        {
+            if (in_array($key, array('x', 'y', 'z')))
+            {
+                $this->assertTrue($this->_model->getPaste($ids[$key])->exists(), "paste $key exists after purge");
+                $this->_model->getPaste($ids[$key])->delete();
+            }
+            else
+            {
+                $this->assertFalse($this->_model->getPaste($ids[$key])->exists(), "paste $key was purged");
+            }
+        }
+    }
+
     public function testCommentWithDisabledVizhash()
     {
         $options = parse_ini_file(CONF, true);
diff --git a/tst/privatebin.php b/tst/privatebin.php
index bf2ccc0..5086207 100644
--- a/tst/privatebin.php
+++ b/tst/privatebin.php
@@ -7,7 +7,6 @@ class privatebinTest extends PHPUnit_Framework_TestCase
     {
         /* Setup Routine */
         $this->_model = privatebin_data::getInstance(array('dir' => PATH . 'data'));
-        serversalt::setPath(PATH . 'data');
         $this->reset();
     }
 
@@ -456,6 +455,28 @@ class privatebinTest extends PHPUnit_Framework_TestCase
         );
     }
 
+    /**
+     * @runInSeparateProcess
+     */
+    public function testCreateTooSoon()
+    {
+        $this->reset();
+        $_POST = helper::getPaste();
+        $_SERVER['HTTP_X_REQUESTED_WITH'] = 'JSONHttpRequest';
+        $_SERVER['REQUEST_METHOD'] = 'POST';
+        $_SERVER['REMOTE_ADDR'] = '::1';
+        ob_start();
+        new privatebin;
+        ob_end_clean();
+        $this->_model->delete(helper::getPasteId());
+        ob_start();
+        new privatebin;
+        $content = ob_get_contents();
+        $response = json_decode($content, true);
+        $this->assertEquals(1, $response['status'], 'outputs error status');
+        $this->assertFalse($this->_model->exists(helper::getPasteId()), 'paste exists after posting data');
+    }
+
     /**
      * @runInSeparateProcess
      */
diff --git a/tst/privatebin/data.php b/tst/privatebin/data.php
index 0372b5a..6184b37 100644
--- a/tst/privatebin/data.php
+++ b/tst/privatebin/data.php
@@ -65,6 +65,7 @@ class privatebin_dataTest extends PHPUnit_Framework_TestCase
 
     public function testPurge()
     {
+        mkdir($this->_path . DIRECTORY_SEPARATOR . '00', 0777, true);
         $expired = helper::getPaste(array('expire_date' => 1344803344));
         $paste = helper::getPaste(array('expire_date' => time() + 3600));
         $keys = array('a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'x', 'y', 'z');
diff --git a/tst/privatebin/db.php b/tst/privatebin/db.php
index 2c8d3b5..0cbf2c1 100644
--- a/tst/privatebin/db.php
+++ b/tst/privatebin/db.php
@@ -78,6 +78,7 @@ class privatebin_dbTest extends PHPUnit_Framework_TestCase
         foreach ($keys as $key)
         {
             $ids[$key] = substr(md5($key), 0, 16);
+            $this->_model->delete($ids[$key]);
             $this->assertFalse($this->_model->exists($ids[$key]), "paste $key does not yet exist");
             if (in_array($key, array('x', 'y', 'z')))
             {
@@ -95,6 +96,7 @@ class privatebin_dbTest extends PHPUnit_Framework_TestCase
             if (in_array($key, array('x', 'y', 'z')))
             {
                 $this->assertTrue($this->_model->exists($ids[$key]), "paste $key exists after purge");
+                $this->_model->delete($ids[$key]);
             }
             else
             {
@@ -224,10 +226,53 @@ class privatebin_dbTest extends PHPUnit_Framework_TestCase
         privatebin_db::getInstance($options);
     }
 
+    public function testOldAttachments()
+    {
+        mkdir(PATH . 'data');
+        $path = PATH . 'data' . DIRECTORY_SEPARATOR . 'attachement-test.sq3';
+        @unlink($path);
+        $this->_options['dsn'] = 'sqlite:' . $path;
+        $this->_options['tbl'] = 'bar_';
+        $model = privatebin_db::getInstance($this->_options);
+
+        $original = $paste = helper::getPasteWithAttachment(array('expire_date' => 1344803344));
+        $paste['meta']['attachment'] = $paste['attachment'];
+        $paste['meta']['attachmentname'] = $paste['attachmentname'];
+        unset($paste['attachment'], $paste['attachmentname']);
+        $meta = $paste['meta'];
+
+        $db = new PDO(
+            $this->_options['dsn'],
+            $this->_options['usr'],
+            $this->_options['pwd'],
+            $this->_options['opt']
+        );
+        $statement = $db->prepare('INSERT INTO bar_paste VALUES(?,?,?,?,?,?,?,?,?)');
+        $statement->execute(
+            array(
+                helper::getPasteId(),
+                $paste['data'],
+                $paste['meta']['postdate'],
+                1344803344,
+                0,
+                0,
+                json_encode($meta),
+                null,
+                null,
+            )
+        );
+        $statement->closeCursor();
+
+        $this->assertTrue($model->exists(helper::getPasteId()), 'paste exists after storing it');
+        $this->assertEquals(json_decode(json_encode($original)), $model->read(helper::getPasteId()));
+
+        helper::rmdir(PATH . 'data');
+    }
+
     public function testTableUpgrade()
     {
         mkdir(PATH . 'data');
-        $path = PATH . 'data/db-test.sq3';
+        $path = PATH . 'data' . DIRECTORY_SEPARATOR . 'db-test.sq3';
         @unlink($path);
         $this->_options['dsn'] = 'sqlite:' . $path;
         $this->_options['tbl'] = 'foo_';
@@ -246,7 +291,17 @@ class privatebin_dbTest extends PHPUnit_Framework_TestCase
             'opendiscussion INT, ' .
             'burnafterreading INT );'
         );
+        $db->exec(
+            'CREATE TABLE foo_comment ( ' .
+            "dataid CHAR(16) NOT NULL, " .
+            'pasteid CHAR(16), ' .
+            'parentid CHAR(16), ' .
+            'data BLOB, ' .
+            'nickname BLOB, ' .
+            'vizhash BLOB, ' .
+            "postdate INT );"
+        );
         privatebin_db::getInstance($this->_options);
-        @unlink($path);
+        helper::rmdir(PATH . 'data');
     }
 }
diff --git a/tst/privatebinWithDb.php b/tst/privatebinWithDb.php
index bd2d85a..a8a8dec 100644
--- a/tst/privatebinWithDb.php
+++ b/tst/privatebinWithDb.php
@@ -19,7 +19,7 @@ class privatebinWithDbTest extends privatebinTest
         /* Setup Routine */
         $this->_path = sys_get_temp_dir() . DIRECTORY_SEPARATOR . 'privatebin_data';
         if(!is_dir($this->_path)) mkdir($this->_path);
-        $this->_options['dsn'] = 'sqlite:' . $this->_path . '/tst.sq3';
+        $this->_options['dsn'] = 'sqlite:' . $this->_path . DIRECTORY_SEPARATOR . 'tst.sq3';
         $this->_model = privatebin_db::getInstance($this->_options);
         $this->reset();
     }