diff --git a/db.class.php b/db.class.php
index 581df1f..f9c22c1 100644
--- a/db.class.php
+++ b/db.class.php
@@ -270,13 +270,10 @@ class DB
       while (($pos = strpos($sql, $type, $lastPos)) !== false) {
         $lastPos = $pos + 1;
         if (isset($posList[$pos]) && strlen($posList[$pos]) > strlen($type)) continue;
-        if (substr($sql, $pos - 1, 1) == '%') continue;
         $posList[$pos] = $type;
       }
     }
     
-    $sql = str_replace('%%', '%', $sql);
-    
     ksort($posList);
     
     foreach ($posList as $pos => $type) {
diff --git a/simpletest/BasicTest.php b/simpletest/BasicTest.php
index 64b98b6..93abb3d 100644
--- a/simpletest/BasicTest.php
+++ b/simpletest/BasicTest.php
@@ -23,11 +23,6 @@ class BasicTest extends SimpleTest {
     DB::useDB('libdb_test');
   }
   
-  function test_0_5_date_format() {
-    $month = DB::queryFirstField("SELECT DATE_FORMAT(NOW(), '%%b')", 4);
-    $this->assert($month === date('M'));
-  }
-  
   
   function test_1_create_table() {
     DB::query("CREATE TABLE `accounts` (