--- group.php	2010-04-15 21:48:05.000000000 +0200
+++ group_patched.php	2010-04-15 21:47:54.000000000 +0200
@@ -67,6 +67,7 @@
 		if (isset($move) && $move == "moveprev") 
         {
             $_SESSION['step']=$_SESSION['step']-1;
+            if ($_SESSION['step']==0){ break;}
         }
 		if (isset($move) && $move == "movenext") 
         {