diff --git a/include/conversation.php b/include/conversation.php
index 9f564843e9..bd9b11bee6 100755
--- a/include/conversation.php
+++ b/include/conversation.php
@@ -373,7 +373,8 @@ function conversation(&$a, $items, $mode, $update, $preview = false) {
 						$comments[$item['parent']] = 1;
 					else
 						$comments[$item['parent']] += 1;
-				}
+				} elseif(! x($comments,$item['parent'])) 
+					$comments[$item['parent']] = 0; // avoid notices later on
 			}
 
 			// map all the like/dislike activities for each parent item 
@@ -921,7 +922,7 @@ function status_editor($a,$x, $notes_cid = 0, $popup=false) {
 	$o .= replace_macros($tpl,array(
 		'$return_path' => $a->cmd,
 		'$action' =>  $a->get_baseurl().'/item',
-		'$share' => (($x['button']) ? $x['button'] : t('Share')),
+		'$share' => (x($x,'button') ? $x['button'] : t('Share')),
 		'$upload' => t('Upload photo'),
 		'$shortupload' => t('upload photo'),
 		'$attach' => t('Attach file'),
diff --git a/include/oembed.php b/include/oembed.php
index 5c3c595f57..52068efc76 100755
--- a/include/oembed.php
+++ b/include/oembed.php
@@ -62,7 +62,7 @@ function oembed_fetch_url($embedurl){
 	
 function oembed_format_object($j){
 	$embedurl = $j->embedurl;
-	$jhtml = oembed_iframe($j->embedurl,$j->width,$j->height );
+	$jhtml = oembed_iframe($j->embedurl,(isset($j->width) ? $j->width : null), (isset($j->height) ? $j->height : null) );
 	$ret="<span class='oembed ".$j->type."'>";
 	switch ($j->type) {
 		case "video": {
diff --git a/include/template_processor.php b/include/template_processor.php
index 28c3f07ddd..7a4cba64e9 100755
--- a/include/template_processor.php
+++ b/include/template_processor.php
@@ -92,8 +92,13 @@
 		 */
 		private function _replcb_for($args){
 			$m = array_map('trim', explode(" as ", $args[2]));
-			list($keyname, $varname) = explode("=>",$m[1]);
-			if (is_null($varname)) { $varname=$keyname; $keyname=""; }
+			$x = explode("=>",$m[1]);
+			if (count($x) == 1) {
+				$varname = $x[0];
+				$keyname = "";
+			} else {
+				list($keyname, $varname) = $x;
+			}
 			if ($m[0]=="" || $varname=="" || is_null($varname)) die("template error: 'for ".$m[0]." as ".$varname."'") ;
 			//$vals = $this->r[$m[0]];
 			$vals = $this->_get_var($m[0]);
diff --git a/mod/network.php b/mod/network.php
index 03a671b615..26265f5a0f 100755
--- a/mod/network.php
+++ b/mod/network.php
@@ -44,7 +44,7 @@ function network_init(&$a) {
 	}
 	
 	$a->page['aside'] .= group_side('network','network',true,$group_id);
-	$a->page['aside'] .= networks_widget($a->get_baseurl() . '/network',(($_GET['nets']) ? $_GET['nets'] : ''));
+	$a->page['aside'] .= networks_widget($a->get_baseurl() . '/network',(x($_GET, 'nets') ? $_GET['nets'] : ''));
 	$a->page['aside'] .= saved_searches($search);
 
 }
@@ -130,15 +130,15 @@ function network_content(&$a, $update = 0) {
 		$starred_active = 'active';
 	}
 	
-	if($_GET['bmark']) {
+	if(x($_GET,'bmark')) {
 		$bookmarked_active = 'active';
 	}
 
-	if($_GET['conv']) {
+	if(x($_GET,'conv')) {
 		$conv_active = 'active';
 	}
 
-	if($_GET['spam']) {
+	if(x($_GET,'spam')) {
 		$spam_active = 'active';
 	}
 
@@ -245,7 +245,7 @@ function network_content(&$a, $update = 0) {
 		$def_acl = array('allow_cid' => '<' . intval($cid) . '>');
 
 	if(! $update) {
-		if(group) {
+		if($group) {
 			if(($t = group_public_members($group)) && (! get_pconfig(local_user(),'system','nowarn_insecure'))) {
 				notice( sprintf( tt('Warning: This group contains %s member from an insecure network.',
 									'Warning: This group contains %s members from an insecure network.',
@@ -492,7 +492,9 @@ function network_content(&$a, $update = 0) {
 
 			$items = conv_sort($items,$ordering);
 
-		}	
+		} else {
+			$items = array();
+		}
 	}