--- index.php	2010-12-15 09:35:44.000000000 +0100
+++ index.php	2011-07-15 05:26:06.000000000 +0200
@@ -63,6 +63,10 @@
 	$display_exif = 0;
     $messages = "Error: PHP EXIF is not available. Set $display_exif = 0; in config.php to remove this message";
 }
+if (!extension_loaded('gd')) {
+    $messages = "Warning: PHP GD extension is not available/loaded. Thumbs disabled.";
+    $label_loading = "GD not available!";
+}
 
 //-----------------------
 // FUNCTIONS
@@ -145,7 +149,8 @@
 //}
 
 if (!defined("GALLERY_ROOT")) define("GALLERY_ROOT", "");
-$thumbdir = rtrim('photos' . "/" .$_REQUEST["dir"],"/");
+if ( ! isset($_GET["dir"]) ) { $_GET["dir"] = ''; }
+$thumbdir = rtrim('photos' . "/" .$_GET["dir"],"/");
 $thumbdir = str_replace("/..", "", $thumbdir); // Prevent looking at any up-level folders
 $currentdir = GALLERY_ROOT . $thumbdir;
 
@@ -207,7 +212,7 @@
 		}
 	}
 	fclose($file_handle);
-}
+} else $img_captions[$file] = $file;
 
 // 3. LOAD FILES
 	        	if ($file != "." && $file != ".." && $file != "folder.jpg")
@@ -279,6 +284,7 @@
 //-----------------------
 // OFFSET DETERMINATION
 //-----------------------
+	if ( ! isset($_GET["page"]) ) { $_GET["page"] = 1; }
 	$offset_start = ($_GET["page"] * $thumbs_pr_page) - $thumbs_pr_page;
 	if (!isset($_GET["page"])) $offset_start = 0;
 	$offset_end = $offset_start + $thumbs_pr_page;
@@ -316,7 +322,7 @@
 if ($_GET['dir'] != "")
 {
 	$breadcrumb_navigation .= "<a href='?dir='>" . $label_home . "</a> > ";
-	$navitems = explode("/", $_REQUEST['dir']);
+	$navitems = explode("/", $_GET['dir']);
 	for($i = 0; $i < sizeof($navitems); $i++)
 	{
 		if ($i == sizeof($navitems)-1) $breadcrumb_navigation .= $navitems[$i];
@@ -366,6 +372,7 @@
 }
 
 //Include hidden links for all images AFTER current page so lightbox is able to browse images on different pages
+if ( $i >= 0 )
 for ($y = $i; $y < sizeof($files); $y++)
 {	
 	$page_navigation .= "<a href='" . $currentdir . "/" . $files[$y]["name"] . "' rel='lightbox[billeder]'  class='hidden' title='" . $img_captions[$files[$y]["name"]] . "'></a>";