Index: branches/5.2.x/core/units/helpers/image_helper.php
===================================================================
diff -u -N -r14699 -r14752
--- branches/5.2.x/core/units/helpers/image_helper.php	(.../image_helper.php)	(revision 14699)
+++ branches/5.2.x/core/units/helpers/image_helper.php	(.../image_helper.php)	(revision 14752)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: image_helper.php 14699 2011-10-26 11:39:38Z alex $
+* @version	$Id: image_helper.php 14752 2011-11-09 14:49:41Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -243,7 +243,7 @@
 			$transparent_index = imagecolortransparent($src_image_rs);
 
 			// if we have a specific transparent color
-			if ($transparent_index >= 0) {
+			if ( $transparent_index >= 0 && $transparent_index < imagecolorstotal($src_image_rs) ) {
 				// get the original image's transparent color's RGB values
 				$transparent_color = imagecolorsforindex($src_image_rs, $transparent_index);
 
@@ -260,7 +260,7 @@
 			}
 
 			// always make a transparent background color for PNGs that don't have one allocated already
-			if ($image_type == IMAGETYPE_PNG) {
+			if ( $image_type == IMAGETYPE_PNG ) {
 				// turn off transparency blending (temporarily)
 				imagealphablending($dst_image_rs, false);