diff --git a/mod/dialogue/dialogues.php b/mod/dialogue/dialogues.php
index 2d9e8955966..7c0733bcb4f 100644
--- a/mod/dialogue/dialogues.php
+++ b/mod/dialogue/dialogues.php
@@ -129,6 +129,7 @@
 			foreach ($conversations as $conversation) {
 				$textarea_name = "reply$conversation->id";
 				if (!empty($_POST[$textarea_name])) {
+                    unset($item);
 					$item->dialogueid = $dialogue->id;
 					$item->conversationid = $conversation->id;
 					$item->userid = $USER->id;
diff --git a/mod/dialogue/lib.php b/mod/dialogue/lib.php
index 514857613a1..b8697c076d6 100644
--- a/mod/dialogue/lib.php
+++ b/mod/dialogue/lib.php
@@ -1047,7 +1047,7 @@ function dialogue_print_tabbed_heading($tabs) {
     }
 
     // print_simple_box_start("center", "$table->width", "#ffffff", 0);
-    echo "<table width=\"$tabs-width\" border=\"0\" valign=\"top\" align=\"center\" ";
+    echo "<table width=\"$tabs->width\" border=\"0\" valign=\"top\" align=\"center\" ";
     echo " cellpadding=\"$tabs->cellpadding\" cellspacing=\"0\" class=\"generaltable\">\n";
 
     if (!empty($tabs->names)) {