diff --git a/classes/db_pdo.php b/classes/db_pdo.php
index 2bf7ac4..d3c20c1 100644
--- a/classes/db_pdo.php
+++ b/classes/db_pdo.php
@@ -83,26 +83,19 @@ abstract class DB_PDO extends PDO {
 	 * @param string $sql
 	 * @param array $data
 	 * @return mixed PDOStatement / FALSE
+	 * @throws InvalidArgumentException
 	 */
 	public function prepare_query($sql, $data)
 	{
 		// Prepare the sql
 		$query = $this->prepare($sql);
 
-		if( ! (is_object($query) || is_resource($query)))
-		{
-			$this->get_last_error();
-			return NULL;
-		}
-
 		// Set the statement in the class variable for easy later access
 		$this->statement = $query;
 
-
 		if( ! (is_array($data) || is_object($data)))
 		{
-			trigger_error("Invalid data argument");
-			return NULL;
+			throw new InvalidArgumentException("Invalid data argument");
 		}
 
 		// Bind the parameters
@@ -114,16 +107,9 @@ abstract class DB_PDO extends PDO {
 			}
 
 			$res = $query->bindValue($k, $value);
-
-			if( ! $res)
-			{
-				trigger_error("Parameter not successfully bound");
-				return NULL;
-			}
 		}
 
 		return $query;
-
 	}
 
 	// -------------------------------------------------------------------------
@@ -164,20 +150,6 @@ abstract class DB_PDO extends PDO {
 
 	// --------------------------------------------------------------------------
 
-	/**
-	 * Return the last error for the current database connection
-	 *
-	 * @return string
-	 */
-	public function get_last_error()
-	{
-		list($i1, $i2, $i3) = $this->errorInfo();
-
-		echo "Error: <pre>{$i1}:{$i2}\n{$i3}</pre>";
-	}
-
-	// --------------------------------------------------------------------------
-
 	/**
 	 * Quote database table name, and set prefix
 	 *
@@ -289,14 +261,11 @@ abstract class DB_PDO extends PDO {
 	 */
 	protected function _quote($str)
 	{
-		// Don't quote numbers
-		if ( ! is_string($str) && is_numeric($str))
-		{
-			return $str;
-		}
-
-		// Don't add additional quotes
-		if (strpos($str, $this->escape_char) === 0 || strrpos($str, $this->escape_char) === 0)
+		// Don't add additional quotes, or quote numbers
+		if (strpos($str, $this->escape_char) === 0 || 
+			strrpos($str, $this->escape_char) === 0 ||
+			( ! is_string($str) && is_numeric($str))
+		)
 		{
 			return $str;
 		}
@@ -552,4 +521,4 @@ abstract class DB_PDO extends PDO {
 		return array($sql, $vals);
 	}
 }
-// End of db_pdo.php
+// End of db_pdo.php
\ No newline at end of file
diff --git a/classes/db_util.php b/classes/db_util.php
index c1ba15b..b674413 100644
--- a/classes/db_util.php
+++ b/classes/db_util.php
@@ -47,10 +47,7 @@ abstract class DB_Util {
 	 */
 	public function __call($method, $args)
 	{
-		if (method_exists($this->conn, $method))
-		{
-			return call_user_func_array(array($this->conn, $method), $args);
-		}
+		return call_user_func_array(array($this->conn, $method), $args);
 	}
 	
 	// --------------------------------------------------------------------------
diff --git a/classes/query_parser.php b/classes/query_parser.php
index 1b7dc69..3666c5d 100644
--- a/classes/query_parser.php
+++ b/classes/query_parser.php
@@ -91,14 +91,7 @@ class Query_Parser {
 
 		foreach($array as $row)
 		{
-			if (is_array($row))
-			{
-				$new_array[] = $row[0];
-			}
-			else
-			{
-				$new_array[] = $row;
-			}
+			$new_array[] =  (is_array($row)) ? $row[0] : $row;
 		}
 
 		return $new_array;
@@ -106,4 +99,4 @@ class Query_Parser {
 
 }
 
-// End of query_parser.php
+// End of query_parser.php
\ No newline at end of file
diff --git a/drivers/firebird/firebird_driver.php b/drivers/firebird/firebird_driver.php
index 66c2064..0505894 100644
--- a/drivers/firebird/firebird_driver.php
+++ b/drivers/firebird/firebird_driver.php
@@ -64,10 +64,7 @@ class Firebird extends DB_PDO {
 		$this->conn = fbird_connect($dbpath, $user, $pass, 'utf-8', 0);
 
 		// Throw an exception to make this match other pdo classes
-		if ( ! is_resource($this->conn))
-		{
-			throw new PDOException(fbird_errmsg());
-		}
+		if ( ! is_resource($this->conn)) throw new PDOException(fbird_errmsg());
 		
 		// Load these classes here because this
 		// driver does not call the constructor
@@ -82,14 +79,6 @@ class Firebird extends DB_PDO {
 		$class = __CLASS__."_util";
 		$this->util = new $class($this);
 	}
-	
-	/**
-	 * Clean up database connections
-	 */
-	public function __destruct()
-	{
-		fbird_close($this->conn);	
-	}
 
 	// --------------------------------------------------------------------------
 
@@ -116,20 +105,15 @@ class Firebird extends DB_PDO {
 	 */
 	public function query($sql)
 	{
-		if (empty($sql))
-		{
-			throw new PDOException("Query method requires an sql query!");
-		}
+		if (empty($sql)) throw new PDOException("Query method requires an sql query!");
 		
 		$this->statement_link = (isset($this->trans))
 			? fbird_query($this->trans, $sql)
 			: fbird_query($this->conn, $sql);
 
 		// Throw the error as a exception
-		if ($this->statement_link === FALSE)
-		{
-			throw new PDOException(fbird_errmsg() . "Last query:" . $this->last_query);
-		}
+		$err_string = fbird_errmsg() . "Last query:" . $this->last_query;
+		if ($this->statement_link === FALSE) throw new PDOException($err_string);
 		
 		$this->statement = new FireBird_Result($this->statement_link);
 
@@ -151,10 +135,7 @@ class Firebird extends DB_PDO {
 		$this->statement_link = fbird_prepare($this->conn, $query);
 
 		// Throw the error as an exception
-		if ($this->statement_link === FALSE)
-		{
-			throw new PDOException(fbird_errmsg());
-		}
+		if ($this->statement_link === FALSE) throw new PDOException(fbird_errmsg());
 
 		$this->statement = new FireBird_Result($this->statement_link);
 
@@ -170,12 +151,7 @@ class Firebird extends DB_PDO {
 	 */
 	public function beginTransaction()
 	{
-		if(($this->trans = fbird_trans($this->conn)) !== NULL)
-		{
-			return TRUE;
-		}
-
-		return NULL;
+		return (($this->trans = fbird_trans($this->conn)) !== NULL) ? TRUE : NULL;
 	}
 
 	// --------------------------------------------------------------------------
diff --git a/drivers/mysql/mysql_driver.php b/drivers/mysql/mysql_driver.php
index 1710e06..7dd3ab1 100644
--- a/drivers/mysql/mysql_driver.php
+++ b/drivers/mysql/mysql_driver.php
@@ -38,6 +38,7 @@ class MySQL extends DB_PDO {
 	 */
 	public function __construct($dsn, $username=null, $password=null, $options=array())
 	{
+		// Automatically set the charset to UTF-8
 		if (defined('PDO::MYSQL_ATTR_INIT_COMMAND'))
 		{
 			$options = array_merge($options, array(
@@ -45,11 +46,6 @@ class MySQL extends DB_PDO {
 			));
 		}
 		
-		if (strpos($dsn, 'mysql') === FALSE)
-		{
-			$dsn = 'mysql:'.$dsn;
-		}
-		
 		parent::__construct($dsn, $username, $password, $options);
 	}
 
diff --git a/drivers/pgsql/pgsql_driver.php b/drivers/pgsql/pgsql_driver.php
index a16610e..c7fa5d2 100644
--- a/drivers/pgsql/pgsql_driver.php
+++ b/drivers/pgsql/pgsql_driver.php
@@ -31,11 +31,6 @@ class PgSQL extends DB_PDO {
 	 */
 	public function __construct($dsn, $username=null, $password=null, $options=array())
 	{
-		if (strpos($dsn, 'pgsql') === FALSE)
-		{
-			$dsn = 'pgsql:'.$dsn;
-		}
-	
 		parent::__construct($dsn, $username, $password, $options);
 	}
 
diff --git a/tests/core/db_qb_test.php b/tests/core/db_qb_test.php
index c25e53e..426f029 100644
--- a/tests/core/db_qb_test.php
+++ b/tests/core/db_qb_test.php
@@ -29,6 +29,22 @@ abstract class QBTest extends UnitTestCase {
 	// --------------------------------------------------------------------------
 	// ! Get Tests
 	// --------------------------------------------------------------------------
+	
+	public function TestInvalidConnectionName()
+	{
+		if (empty($this->db)) return;
+	
+		try 
+		{
+			$db = Query('foo');
+		}
+		catch (InvalidArgumentException $e)
+		{
+			$this->assertTrue(TRUE);
+		}
+	}
+	
+	// --------------------------------------------------------------------------
 
 	public function TestQueryFunctionAlias()
 	{