diff --git a/codepot/src/codepot/controllers/code.php b/codepot/src/codepot/controllers/code.php
index 471ad176..e7e9d1e3 100644
--- a/codepot/src/codepot/controllers/code.php
+++ b/codepot/src/codepot/controllers/code.php
@@ -28,7 +28,7 @@ class Code extends Controller
 		return $this->file ($projectid, $subdir, $rev);
 	}
 
-	function file ($projectid, $path = '', $rev = SVN_REVISION_HEAD)
+	function file ($projectid = '', $path = '', $rev = SVN_REVISION_HEAD)
 	{
 		$this->load->model ('ProjectModel', 'projects');
 		$this->load->model ('SubversionModel', 'subversion');
@@ -105,7 +105,7 @@ class Code extends Controller
 		}
 	}
 
-	function blame ($projectid, $path, $rev = SVN_REVISION_HEAD)
+	function blame ($projectid = '', $path = '', $rev = SVN_REVISION_HEAD)
 	{
 		$this->load->model ('ProjectModel', 'projects');
 		$this->load->model ('SubversionModel', 'subversion');
@@ -169,7 +169,7 @@ class Code extends Controller
 		}
 	}
 
-	function history ($projectid, $path = '', $rev = SVN_REVISION_HEAD)
+	function history ($projectid = '', $path = '', $rev = SVN_REVISION_HEAD)
 	{
 		$this->load->model ('ProjectModel', 'projects');
 		$this->load->model ('SubversionModel', 'subversion');
@@ -222,7 +222,7 @@ class Code extends Controller
 		}
 	}
 
-	function revision ($projectid, $path, $rev = SVN_REVISION_HEAD)
+	function revision ($projectid = '', $path = '', $rev = SVN_REVISION_HEAD)
 	{
 		$this->load->model ('ProjectModel', 'projects');
 		$this->load->model ('SubversionModel', 'subversion');
@@ -275,7 +275,7 @@ class Code extends Controller
 		}
 	}
 
-	function diff ($projectid, $path, $rev1 = SVN_REVISION_HEAD, $rev2 = SVN_REVISION_HEAD)
+	function diff ($projectid = '', $path = '', $rev1 = SVN_REVISION_HEAD, $rev2 = SVN_REVISION_HEAD)
 	{
 		$this->load->model ('ProjectModel', 'projects');
 		$this->load->model ('SubversionModel', 'subversion');
diff --git a/codepot/src/codepot/controllers/file.php b/codepot/src/codepot/controllers/file.php
index 55a63dcc..d1f468a2 100644
--- a/codepot/src/codepot/controllers/file.php
+++ b/codepot/src/codepot/controllers/file.php
@@ -21,7 +21,7 @@ class File extends Controller
 		$this->lang->load ('file', CODEPOT_LANG);
 	}
 
-	function home ($projectid = "")
+	function home ($projectid = '')
 	{
 		$this->load->model ('ProjectModel', 'projects');
 		$this->load->model ('FileModel', 'files');
@@ -62,7 +62,7 @@ class File extends Controller
 		}
 	}
 
-	function show ($projectid, $name)
+	function show ($projectid = '', $name = '')
 	{
 		$this->load->model ('ProjectModel', 'projects');
 		$this->load->model ('FileModel', 'files');
@@ -112,7 +112,7 @@ class File extends Controller
 		}
 	}
 
-	function get ($projectid, $name)
+	function get ($projectid = '', $name = '')
 	{
 		$this->load->model ('ProjectModel', 'projects');
 		$this->load->model ('FileModel', 'files');
@@ -384,17 +384,17 @@ class File extends Controller
 		}
 	}
 
-	function create ($projectid, $name = "")
+	function create ($projectid = '', $name = '')
 	{
 		return $this->_edit_file ($projectid, $name, "create");
 	}
 
-	function update ($projectid, $name)
+	function update ($projectid = '', $name = '')
 	{
 		return $this->_edit_file ($projectid, $name, "update");
 	}
 
-	function delete ($projectid, $name)
+	function delete ($projectid = '', $name = '')
 	{
 		$this->load->helper ('form');
 		$this->load->library ('form_validation');
diff --git a/codepot/src/codepot/controllers/site.php b/codepot/src/codepot/controllers/site.php
index 49a400de..5cc4f52d 100644
--- a/codepot/src/codepot/controllers/site.php
+++ b/codepot/src/codepot/controllers/site.php
@@ -112,7 +112,7 @@ class Site extends Controller
 		}
 	}
 
-	function show ($siteid)
+	function show ($siteid = '')
 	{
 		$login = $this->login->getUser ();
 		if (CODEPOT_SIGNIN_COMPULSORY && $login['id'] == '')
@@ -213,7 +213,7 @@ class Site extends Controller
 		}
 	}
 
-	function create ($siteid = "")
+	function create ($siteid = '')
 	{
 		$this->load->model ('SiteModel', 'sites');
 
@@ -237,7 +237,7 @@ class Site extends Controller
 		}
 	}
 
-	function update ($siteid)
+	function update ($siteid = '')
 	{
 		$this->load->model ('SiteModel', 'sites');
 
@@ -329,7 +329,7 @@ class Site extends Controller
 		}
 	}
 
-	function delete ($siteid)
+	function delete ($siteid = '')
 	{
 		$this->load->model ('SiteModel', 'sites');
 
diff --git a/codepot/src/codepot/models/loginmodel.php b/codepot/src/codepot/models/loginmodel.php
index 61617963..6cdfc4ba 100644
--- a/codepot/src/codepot/models/loginmodel.php
+++ b/codepot/src/codepot/models/loginmodel.php
@@ -38,7 +38,11 @@ class LoginModel extends Model
 			if ($issysadmin === NULL) $issysadmin = FALSE;
 
 			$settings = $this->session->userdata('user_settings');
-			if ($settings !== NULL) $settings = unserialize ($settings);
+			if ($settings !== NULL) 
+			{
+				$settings = @unserialize ($settings);
+				if ($settings === FALSE) $settings = NULL;
+			}
 		}
 
 		return array (