diff --git a/index.php b/index.php
index b760bd7..fe55e59 100644
--- a/index.php
+++ b/index.php
@@ -67,7 +67,7 @@ $dtstart = date('Y-m-d H:i:s', strtotime($dtend .' -'. $defaultRecentDays .' day
 $tplVars['page'] = $page;
 $tplVars['start'] = $start;
 $tplVars['popCount'] = 30;
-$tplVars['sidebar_blocks'] = array('recent');
+$tplVars['sidebar_blocks'] = array('linked', 'recent');
 $tplVars['range'] = 'all';
 $tplVars['pagetitle'] = T_('Store, share and tag your favourite links');
 $tplVars['subtitle'] = T_('Recent Bookmarks');
@@ -84,4 +84,4 @@ if ($usecache) {
     // Cache output if existing copy has expired
     $cacheservice->End($hash);
 }
-?>
\ No newline at end of file
+?>
diff --git a/services/tag2tagservice.php b/services/tag2tagservice.php
index 0b53d64..d522039 100644
--- a/services/tag2tagservice.php
+++ b/services/tag2tagservice.php
@@ -88,14 +88,18 @@ class Tag2TagService {
 	return $output;
     }
 
-    function getOrphewTags($relationType, $uId) {
+    function getOrphewTags($relationType, $uId = 0) {
 	$query = "SELECT DISTINCT tag1 as tag FROM `". $this->getTableName() ."`";
 	$query.= " WHERE tag1 <> ALL";
 	$query.= " (SELECT DISTINCT tag2 FROM `". $this->getTableName() ."`";
 	$query.= " WHERE relationType = '".$relationType."'";
-	$query.= " AND uId = '".$uId."'";
+	if($uId > 0) {
+	    $query.= " AND uId = '".$uId."'";
+	}
 	$query.= ")";
-	$query.= " AND uId = '".$uId."'";
+	if($uId > 0) {
+	    $query.= " AND uId = '".$uId."'";
+	}
 
 	//die($query);
 
diff --git a/tag2tagadd.php b/tag2tagadd.php
index 916c388..83af1d6 100644
--- a/tag2tagadd.php
+++ b/tag2tagadd.php
@@ -24,13 +24,22 @@ $tag2tagservice = & ServiceFactory :: getServiceInstance('Tag2TagService');
 $templateservice = & ServiceFactory :: getServiceInstance('TemplateService');
 $userservice = & ServiceFactory :: getServiceInstance('UserService');
 
+$logged_on_user = $userservice->getCurrentUser();
+
+//permissions
+if($logged_on_user == null) {
+    $tplVars['error'] = T_('Permission denied.');
+    $templateservice->loadTemplate('error.500.tpl', $tplVars);
+    exit();
+}
+
+
 list ($url, $tag) = explode('/', $_SERVER['PATH_INFO']);
 
 if ($_POST['confirm']) {
     $newTag = $_POST['newTag'];
     if ($tag2tagservice->addLinkedTags($tag, $newTag, '>', $userservice->getCurrentUserId())) {
         $tplVars['msg'] = T_('Tag link created');
-        $logged_on_user = $userservice->getCurrentUser();
         header('Location: '. createURL('bookmarks', $logged_on_user[$userservice->getFieldName('username')]));
     } else {
         $tplVars['error'] = T_('Failed to create the link');
@@ -38,7 +47,6 @@ if ($_POST['confirm']) {
         exit();
     }
 } elseif ($_POST['cancel']) {
-    $logged_on_user = $userservice->getCurrentUser();
     header('Location: '. createURL('bookmarks', $logged_on_user[$userservice->getFieldName('username')] .'/'. $tags));
 }
 
diff --git a/tag2tagdelete.php b/tag2tagdelete.php
index e75e60a..f794456 100644
--- a/tag2tagdelete.php
+++ b/tag2tagdelete.php
@@ -24,12 +24,20 @@ $tag2tagservice = & ServiceFactory :: getServiceInstance('Tag2TagService');
 $templateservice = & ServiceFactory :: getServiceInstance('TemplateService');
 $userservice = & ServiceFactory :: getServiceInstance('UserService');
 
+$logged_on_user = $userservice->getCurrentUser();
+
+//permissions
+if($logged_on_user == null) {
+    $tplVars['error'] = T_('Permission denied.');
+    $templateservice->loadTemplate('error.500.tpl', $tplVars);
+    exit();
+}
+
 list ($url, $tag1, $tag2) = explode('/', $_SERVER['PATH_INFO']);
 
 if ($_POST['confirm']) {
     if ($tag2tagservice->removeLinkedTags($_POST['tag1'], $_POST['tag2'], '>', $userservice->getCurrentUserId())) {
         $tplVars['msg'] = T_('Tag link deleted');
-        $logged_on_user = $userservice->getCurrentUser();
         header('Location: '. createURL('bookmarks', $logged_on_user[$userservice->getFieldName('username')]));
     } else {
         $tplVars['error'] = T_('Failed to delete the link');
@@ -37,7 +45,6 @@ if ($_POST['confirm']) {
         exit();
     }
 } elseif ($_POST['cancel']) {
-    $logged_on_user = $userservice->getCurrentUser();
     header('Location: '. createURL('bookmarks', $logged_on_user[$userservice->getFieldName('username')] .'/'. $tags));
 }
 
diff --git a/tags.php b/tags.php
index ff46881..81956fd 100644
--- a/tags.php
+++ b/tags.php
@@ -70,7 +70,7 @@ $tplVars['page'] = $page;
 $tplVars['start'] = $start;
 $tplVars['popCount'] = 25;
 $tplVars['currenttag'] = $cat;
-$tplVars['sidebar_blocks'] = array('related', 'popular');
+$tplVars['sidebar_blocks'] = array('linked', 'related', 'popular');
 $tplVars['subtitle'] = filter($pagetitle);
 $tplVars['bookmarkCount'] = $start + 1;
 $bookmarks =& $bookmarkservice->getBookmarks($start, $perpage, NULL, $cat, NULL, getSortOrder());
diff --git a/templates/sidebar.block.linked.php b/templates/sidebar.block.linked.php
index 23bcb0c..5a891ea 100644
--- a/templates/sidebar.block.linked.php
+++ b/templates/sidebar.block.linked.php
@@ -64,7 +64,11 @@ if(count($explodedTags) > 0) {
 <div id="linked">
     <table>
     <?php
-	$editingMode = ($userid === $logged_on_userid);
+	if(($logged_on_userid != null) && ($userid === $logged_on_userid)) {
+	    $editingMode = true;
+	} else {
+	    $editingMode = false;
+	}
 	foreach($explodedTags as $explodedTag) {
 		echo displayLinkedTags($explodedTag, '>', $userid, $cat_url, $user, $editingMode);
 	}
diff --git a/tests/tag2TagTest.php b/tests/tag2TagTest.php
index 6660761..3a8466f 100644
--- a/tests/tag2TagTest.php
+++ b/tests/tag2TagTest.php
@@ -57,6 +57,9 @@ class Tag2TagTest extends PHPUnit_Framework_TestCase
 	$this->assertEquals(2, sizeof($orphewTags));
 	$this->assertSame('a', $orphewTags[0]['tag']);
 	$this->assertSame('f', $orphewTags[1]['tag']);
+	$orphewTags = $tts->getOrphewTags('>');
+	$this->assertEquals(2, sizeof($orphewTags));
+	$this->assertSame('f', $orphewTags[0]['tag']);
 	
 	$linkedTags = $tts->getLinkedTags('a', '>', 1);
 	$this->assertSame(array('b', 'c'), $linkedTags);
@@ -66,6 +69,8 @@ class Tag2TagTest extends PHPUnit_Framework_TestCase
 	$tts->removeLinkedTags('a', 'c', '>', 1);
 	$linkedTags = $tts->getLinkedTags('a', '>', 1);
 	$this->assertEquals(0, sizeof($linkedTags));
+	$linkedTags = $tts->getLinkedTags('a', '>');
+	$this->assertSame(array('b', 'c', 'd'), $linkedTags);
     }
 
    public function testAddLinkedTagsThroughBookmarking()