--- original\tcpdf\tcpdf.php	2013-10-29 14:26:52.000000000 -0400
+++ wp-post-to-pdf.2.4.0\tcpdf\tcpdf.php	2013-11-09 22:54:24.000000000 -0500
@@ -16825,13 +16825,15 @@
 							// rows on thead block are printed as a separate table
 						} else {
 							$dom[$key]['thead'] = false;
 							// store the number of rows on table element
 							++$dom[($dom[$key]['parent'])]['rows'];
 							// store the TR elements IDs on table element
-							array_push($dom[($dom[$key]['parent'])]['trids'], $key);
+							if (is_null($dom[($dom[$key]['parent'])]['trids']))
+								$dom[($dom[$key]['parent'])]['trids'] = array();
 						}
 					}
 					if (($dom[$key]['value'] == 'th') OR ($dom[$key]['value'] == 'td')) {
 						if (isset($dom[$key]['attribute']['colspan'])) {
 							$colspan = intval($dom[$key]['attribute']['colspan']);
 						} else {