diff --git a/home/ims/ims_import.php b/home/ims/ims_import.php
index 57ba69c0..785dc240 100644
--- a/home/ims/ims_import.php
+++ b/home/ims/ims_import.php
@@ -237,7 +237,7 @@ function checkResources($import_path){
 		}
 
 		//validate the xml by its schema
-		if (preg_match('/imsqti\_(.*)/', $fileinfo['type'])){
+		if (isset($fileinfo['type']) && preg_match('/imsqti\_(.*)/', $fileinfo['type'])){
 			$qti = new QTIParser($fileinfo['type']);
 			$xml_content = @file_get_contents($import_path . $fileinfo['href']);
 			$qti->parse($xml_content); //will add error to $msg if failed			
@@ -455,7 +455,7 @@ function startElement($parser, $name, $attrs) {
 		global $course_primary_lang;
 		
 		// get language from CONTENT PACKAGE
-		if (substr($element_path[count($element_path)-1], -6) == ':title' && substr($name, -11) == ':langstring') {
+		if (count($element_path) > 0 && substr($element_path[count($element_path)-1], -6) == ':title' && substr($name, -11) == ':langstring') {
 			$course_primary_lang = trim($attrs['xml:lang']);
 		}
 		
@@ -498,7 +498,7 @@ function startElement($parser, $name, $attrs) {
 			// special case for webCT content packages that don't specify the `href` attribute 
 			// with the `<resource>` element.
 			// we take the `href` from the first `<file>` element.
-			if (isset($items[$current_identifier]) && ($items[$current_identifier]['href'] == '')) {
+			if (isset($items[$current_identifier]) && isset($items[$current_identifier]['href']) && ($items[$current_identifier]['href'] == '')) {
 				$attrs['href'] = urldecode($attrs['href']);
 				$items[$current_identifier]['href'] = $attrs['href'];
 			}
@@ -565,7 +565,7 @@ function startElement($parser, $name, $attrs) {
 			if (isset($_POST['allow_a4a_import']) && isset($items[$current_identifier])) {
 				$items[$current_identifier]['a4a_import_enabled'] = true;
 			}
-		} else if (($name == 'item') && ($attrs['identifierref'] != '')) {
+		} else if (($name == 'item') && array_key_exists('identifierref', $attrs) && ($attrs['identifierref'] != '')) {
 			$path[] = $attrs['identifierref'];
 		} else if (($name == 'item') && ($attrs['identifier'])) {
 			$path[] = $attrs['identifier'];
@@ -573,7 +573,7 @@ function startElement($parser, $name, $attrs) {
 		} else if (($name == 'resource')) {
 			$current_identifier = $attrs['identifier'];
 			$items[$current_identifier]['type'] = $attrs['type'];
-			if ($attrs['href']) {
+			if (isset($attrs['href'])) {
 				$attrs['href'] = urldecode($attrs['href']);
 
 				$items[$attrs['identifier']]['href'] = $attrs['href'];
@@ -596,7 +596,7 @@ function startElement($parser, $name, $attrs) {
 			//if there is a dependency, attach it to the item array['file']
 			$items[$current_identifier]['dependency'][] = $attrs['identifierref'];
 		}
-		if (($name == 'item') && ($attrs['parameters'] != '')) {
+		if (($name == 'item') && array_key_exists('parameters', $attrs) && ($attrs['parameters'] != '')) {
 			$items[$attrs['identifierref']]['test_message'] = $attrs['parameters'];
 		}
 		if ($name=='file'){
@@ -633,17 +633,19 @@ function endElement($parser, $name) {
 
 		// added by Cindy Li on Jan 10, 2010
 		// Extract course title, description and primary language for a newly-created course
-		if (substr($element_path[count($element_path)-2], -6) == ':title') {
-			if (substr($element_path[count($element_path)-1], -7) == ':string' ||
-			    substr($element_path[count($element_path)-1], -11) == ':langstring') {
-				$course_title = trim($my_data);
+		if (count($element_path) >= 2) {
+			if (substr($element_path[count($element_path)-2], -6) == ':title') {
+				if (substr($element_path[count($element_path)-1], -7) == ':string' ||
+					substr($element_path[count($element_path)-1], -11) == ':langstring') {
+					$course_title = trim($my_data);
+				}
 			}
-		}
 		
-		if (substr($element_path[count($element_path)-2], -12) == ':description') {
-			if (substr($element_path[count($element_path)-1], -7) == ':string' ||
-			    substr($element_path[count($element_path)-1], -11) == ':langstring') {
-				$course_description = trim($my_data);
+			if (substr($element_path[count($element_path)-2], -12) == ':description') {
+				if (substr($element_path[count($element_path)-1], -7) == ':string' ||
+					substr($element_path[count($element_path)-1], -11) == ':langstring') {
+					$course_description = trim($my_data);
+				}
 			}
 		}
 		
diff --git a/home/prog.php b/home/prog.php
index 19487bff..8166b922 100644
--- a/home/prog.php
+++ b/home/prog.php
@@ -15,7 +15,7 @@
 define('TR_INCLUDE_PATH', '../include/');
 require(TR_INCLUDE_PATH.'vitals.inc.php');
 session_write_close();
-if ($_GET['tile']) {
+if (isset($_GET['tile']) && $_GET['tile']) {
 	$lang_variable = 'tile_progress';
 } else {
 	$lang_variable = 'upload_progress';
@@ -26,19 +26,19 @@
 <html lang="<?php echo $myLang->getCode(); ?>">
 <head>
 	<title><?php echo _AT($lang_variable); ?></title>
-	<?php if ($_GET['frame']) { ?>
+	<?php if (array_key_exists('frame', $_GET)) { ?>
 		<META HTTP-EQUIV="refresh" content="3;URL=prog.php?frame=1"> 
 	<?php } ?>
 	<link rel="stylesheet" href="<?php echo $_base_path; ?>themes/<?php echo $_SESSION['prefs']['PREF_THEME']; ?>/styles.css" type="text/css" />
 	<meta http-equiv="Content-Type" content="text/html; <?php echo $myLang->getCharacterSet(); ?>" />
 </head>
 <body <?php
-	if ($_SESSION['done']) {
+	if (array_key_exists('done', $_SESSION)) {
 		echo 'onload="parent.window.close();"';
 	}
 ?>>
 <?php 
-if (!$_GET['frame']) {  ?>
+if (!array_key_exists('frame', $_GET)) {  ?>
 &nbsp;<a href="javascript:window.close();"><?php echo _AT('close'); ?></a>
 <h3><?php echo _AT($lang_variable); ?></h3>
 <p><small><?php echo _AT('window_auto_close'); ?></small></p>
@@ -51,30 +51,32 @@
 </iframe>
 <?php } else { 
 	$tmp_dir = ini_get('upload_tmp_dir') . DIRECTORY_SEPARATOR;
-	if (!$_GET['t']) {
-		$newest_file_name = '';
-		$newest_file_time = 0;
-		// get the name of the temp file.
-		if ($dir = @opendir($tmp_dir)) {
-			while (($file = readdir($dir)) !== false) {
-				if ((strlen($file) == 9) && (substr($file, 0, 3) == 'php')) {
-					$filedata = stat($tmp_dir . $file);
-					if ($filedata['mtime'] > $newest_file_time) {
-						$newest_file_time = $filedata['mtime'];
-						$newest_file_name = $file;
-						$size = $filedata['size'] / 1024;
+	if (isset($_GET['t'])) {
+		if (!$_GET['t']) {
+			$newest_file_name = '';
+			$newest_file_time = 0;
+			// get the name of the temp file.
+			if ($dir = @opendir($tmp_dir)) {
+				while (($file = readdir($dir)) !== false) {
+					if ((strlen($file) == 9) && (substr($file, 0, 3) == 'php')) {
+						$filedata = stat($tmp_dir . $file);
+						if ($filedata['mtime'] > $newest_file_time) {
+							$newest_file_time = $filedata['mtime'];
+							$newest_file_name = $file;
+							$size = $filedata['size'] / 1024;
+						}
 					}
 				}
+				closedir($dir);
 			}
-			closedir($dir);
+		} else {
+			$filedata = stat($tmp_dir . $_GET['t']);
+			$size = $filedata['size'] / TR_KBYTE_SIZE;
 		}
-	} else {
-		$filedata = stat($tmp_dir . $_GET['t']);
-		$size = $filedata['size'] / TR_KBYTE_SIZE;
 	}
-	// not sure where these are displayed in the progress popup
+	// displayed in the small iframe alongside the progress animated image
 	echo '<small>';
-	if ($size == '') {
+	if (!isset($size) || isset($size) && $size == '') {
 		echo '<em>'._AT('unknown').' </em>  '._AT('kb');
 	} else {
 		echo number_format($size, 2).' '._AT('kb');