diff --git a/CHANGELOG.TXT b/CHANGELOG.TXT
index 8b18c0f..09e50bd 100644
--- a/CHANGELOG.TXT
+++ b/CHANGELOG.TXT
@@ -1,3 +1,7 @@
+6.2.4 (2015-01-08)
+	- fix warning related to empty K_PATH_URL.
+	- fix error when a $table_colwidths key is not set.
+
 6.2.3 (2014-12-18)
 	- New comment.
 	- Moved the K_PATH_IMAGES definition in tcpdf_autoconfig.
diff --git a/README.TXT b/README.TXT
index 07ed3f8..5d26164 100644
--- a/README.TXT
+++ b/README.TXT
@@ -8,11 +8,11 @@ http://sourceforge.net/donate/index.php?group_id=128076
 ------------------------------------------------------------
 
 Name: TCPDF
-Version: 6.2.3
-Release date: 2014-12-18
+Version: 6.2.4
+Release date: 2015-01-08
 Author:	Nicola Asuni
 
-Copyright (c) 2002-2014:
+Copyright (c) 2002-2015:
 	Nicola Asuni
 	Tecnick.com LTD
 	www.tecnick.com
diff --git a/composer.json b/composer.json
index 1897293..f0aceda 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,6 @@
 {
 	"name": "tecnick.com/tcpdf",
-	"version": "6.2.3",
+	"version": "6.2.4",
 	"homepage": "http://www.tcpdf.org/",
 	"type": "library",
 	"description": "TCPDF is a PHP class for generating PDF documents and barcodes.",
diff --git a/include/tcpdf_static.php b/include/tcpdf_static.php
index da87518..cd86680 100644
--- a/include/tcpdf_static.php
+++ b/include/tcpdf_static.php
@@ -1,13 +1,13 @@
 <?php
 //============================================================+
 // File name   : tcpdf_static.php
-// Version     : 1.1.0
+// Version     : 1.1.1
 // Begin       : 2002-08-03
-// Last Update : 2014-12-10
+// Last Update : 2015-01-08
 // Author      : Nicola Asuni - Tecnick.com LTD - www.tecnick.com - info@tecnick.com
 // License     : GNU-LGPL v3 (http://www.gnu.org/copyleft/lesser.html)
 // -------------------------------------------------------------------
-// Copyright (C) 2002-2014 Nicola Asuni - Tecnick.com LTD
+// Copyright (C) 2002-2015 Nicola Asuni - Tecnick.com LTD
 //
 // This file is part of TCPDF software library.
 //
@@ -38,7 +38,7 @@
  * This is a PHP class that contains static methods for the TCPDF class.<br>
  * @package com.tecnick.tcpdf
  * @author Nicola Asuni
- * @version 1.1.0
+ * @version 1.1.1
  */
 
 /**
@@ -46,7 +46,7 @@
  * Static methods used by the TCPDF class.
  * @package com.tecnick.tcpdf
  * @brief PHP class for generating PDF documents without requiring external extensions.
- * @version 1.1.0
+ * @version 1.1.1
  * @author Nicola Asuni - info@tecnick.com
  */
 class TCPDF_STATIC {
@@ -2480,7 +2480,7 @@ class TCPDF_STATIC {
 		}
 		$urldata = @parse_url($url);
 		if (!isset($urldata['query']) OR (strlen($urldata['query']) <= 0)) {
-			if (strpos($url, K_PATH_URL) === 0) {
+			if (K_PATH_URL AND (strpos($url, K_PATH_URL) === 0)) {
 				// convert URL to full server path
 				$tmp = str_replace(K_PATH_URL, K_PATH_MAIN, $url);
 				$tmp = htmlspecialchars_decode(urldecode($tmp));
diff --git a/tcpdf.php b/tcpdf.php
index 92ac141..0a9f011 100644
--- a/tcpdf.php
+++ b/tcpdf.php
@@ -1,13 +1,13 @@
 <?php
 //============================================================+
 // File name   : tcpdf.php
-// Version     : 6.2.3
+// Version     : 6.2.4
 // Begin       : 2002-08-03
-// Last Update : 2014-12-18
+// Last Update : 2015-01-08
 // Author      : Nicola Asuni - Tecnick.com LTD - www.tecnick.com - info@tecnick.com
 // License     : GNU-LGPL v3 (http://www.gnu.org/copyleft/lesser.html)
 // -------------------------------------------------------------------
-// Copyright (C) 2002-2014 Nicola Asuni - Tecnick.com LTD
+// Copyright (C) 2002-2015 Nicola Asuni - Tecnick.com LTD
 //
 // This file is part of TCPDF software library.
 //
@@ -104,7 +104,7 @@
  * Tools to encode your unicode fonts are on fonts/utils directory.</p>
  * @package com.tecnick.tcpdf
  * @author Nicola Asuni
- * @version 6.2.3
+ * @version 6.2.4
  */
 
 // TCPDF configuration
@@ -128,7 +128,7 @@ require_once(dirname(__FILE__).'/include/tcpdf_static.php');
  * TCPDF project (http://www.tcpdf.org) has been originally derived in 2002 from the Public Domain FPDF class by Olivier Plathey (http://www.fpdf.org), but now is almost entirely rewritten.<br>
  * @package com.tecnick.tcpdf
  * @brief PHP class for generating PDF documents without requiring external extensions.
- * @version 6.2.3
+ * @version 6.2.4
  * @author Nicola Asuni - info@tecnick.com
  */
 class TCPDF {
@@ -6819,10 +6819,10 @@ class TCPDF {
 		if ($this->state != 2) {
 			return;
 		}
-		if ($x === '') {
+		if (strcmp($x, '') === 0) {
 			$x = $this->x;
 		}
-		if ($y === '') {
+		if (strcmp($y, '') === 0) {
 			$y = $this->y;
 		}
 		// check page for no-write regions and adapt page margins if necessary
@@ -18175,7 +18175,7 @@ Putting 1 is equivalent to putting 0 and calling Ln() just after. Default value:
 							// inherit column width
 							$cellw = 0;
 							for ($i = 0; $i < $colspan; ++$i) {
-								$cellw += $table_colwidths[($colid + $i)];
+								$cellw += (isset($table_colwidths[($colid + $i)]) ? $table_colwidths[($colid + $i)] : 0);
 							}
 						}
 						$cellw += (($colspan - 1) * $cellspacing['H']);