diff --git a/Classes/PHPExcel/Chart/Renderer/jpgraph.php b/Classes/PHPExcel/Chart/Renderer/jpgraph.php
index ab55c15a..23ea6e3c 100644
--- a/Classes/PHPExcel/Chart/Renderer/jpgraph.php
+++ b/Classes/PHPExcel/Chart/Renderer/jpgraph.php
@@ -744,6 +744,8 @@ class PHPExcel_Chart_Renderer_jpgraph
 
 
 	public function render($outputDestination) {
+        self::$_plotColour = 0;
+
 		$groupCount = $this->_chart->getPlotArea()->getPlotGroupCount();
 
 		$dimensions = null;
diff --git a/Tests/35chartrender.php b/Tests/35chartrender.php
new file mode 100644
index 00000000..a2189b6d
--- /dev/null
+++ b/Tests/35chartrender.php
@@ -0,0 +1,131 @@
+<?php
+
+/** Error reporting */
+error_reporting(E_ALL);
+ini_set('display_errors', TRUE);
+ini_set('display_startup_errors', TRUE);
+date_default_timezone_set('Europe/London');
+
+define('EOL',(PHP_SAPI == 'cli') ? PHP_EOL : '<br />');
+
+date_default_timezone_set('Europe/London');
+
+/**
+ * PHPExcel
+ *
+ * Copyright (C) 2006 - 2012 PHPExcel
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * @category   PHPExcel
+ * @package    PHPExcel
+ * @copyright  Copyright (c) 2006 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
+ * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt	LGPL
+ * @version    ##VERSION##, ##DATE##
+ */
+
+/** Include path **/
+set_include_path(get_include_path() . PATH_SEPARATOR . '../Classes/');
+
+/** PHPExcel_IOFactory */
+include 'PHPExcel/IOFactory.php';
+
+
+//	Change these values to select the Rendering library that you wish to use
+//		and its directory location on your server
+//$rendererName = PHPExcel_Settings::PDF_RENDERER_MPDF;
+$rendererName = PHPExcel_Settings::CHART_RENDERER_JPGRAPH;
+$rendererLibrary = 'jpgraph3.5.0b1/src';
+$rendererLibraryPath = '/php/libraries/Charts/' . $rendererLibrary;
+
+
+if (!PHPExcel_Settings::setChartRenderer(
+		$rendererName,
+		$rendererLibraryPath
+	)) {
+	die(
+		'NOTICE: Please set the $rendererName and $rendererLibraryPath values' .
+		EOL .
+		'at the top of this script as appropriate for your directory structure'
+	);
+}
+
+
+$inputFileType = 'Excel2007';
+$inputFileNames = 'templates/32readwrite*[0-9].xlsx';
+
+	if ((isset($argc)) && ($argc > 1)) {
+	$inputFileNames = array();
+	for($i = 1; $i < $argc; ++$i) {
+		$inputFileNames[] = __DIR__ . '/templates/' . $argv[$i];
+	}
+} else {
+	$inputFileNames = glob($inputFileNames);
+}
+foreach($inputFileNames as $inputFileName) {
+	$inputFileNameShort = basename($inputFileName);
+
+	if (!file_exists($inputFileName)) {
+		echo date('H:i:s') , " File " , $inputFileNameShort , ' does not exist' , EOL;
+		continue;
+	}
+
+	echo date('H:i:s') , " Load Test from $inputFileType file " , $inputFileNameShort , EOL;
+
+	$objReader = PHPExcel_IOFactory::createReader($inputFileType);
+	$objReader->setIncludeCharts(TRUE);
+	$objPHPExcel = $objReader->load($inputFileName);
+
+
+	echo date('H:i:s') , " Iterate worksheets looking at the charts" , EOL;
+	foreach ($objPHPExcel->getWorksheetIterator() as $worksheet) {
+		$sheetName = $worksheet->getTitle();
+		echo 'Worksheet: ' , $sheetName , EOL;
+
+		$chartNames = $worksheet->getChartNames();
+		if(empty($chartNames)) {
+			echo '    There are no charts in this worksheet' , EOL;
+		} else {
+			natsort($chartNames);
+			foreach($chartNames as $i => $chartName) {
+				$chart = $worksheet->getChartByName($chartName);
+				if (!is_null($chart->getTitle())) {
+					$caption = '"' . implode(' ',$chart->getTitle()->getCaption()) . '"';
+				} else {
+					$caption = 'Untitled';
+				}
+				echo '    ' , $chartName , ' - ' , $caption , EOL;
+				echo str_repeat(' ',strlen($chartName)+3);
+
+				$jpegFile = str_replace('.xlsx', '.jpg', $inputFileNameShort);
+				if (file_exists($jpegFile)) {
+					unlink($jpegFile);
+				}
+				$chart->render($jpegFile);
+			}
+		}
+	}
+
+
+	$objPHPExcel->disconnectWorksheets();
+	unset($objPHPExcel);
+}
+
+// Echo memory peak usage
+echo date('H:i:s') , ' Peak memory usage: ' , (memory_get_peak_usage(true) / 1024 / 1024) , " MB" , EOL;
+
+// Echo done
+echo date('H:i:s') , " Done rendering charts as images" , EOL;
+echo 'Image files have been created in ' , getcwd() , EOL;