diff --git a/inc/lib_base.php b/inc/lib_base.php
index 5a70db535d..5992004f53 100755
--- a/inc/lib_base.php
+++ b/inc/lib_base.php
@@ -40,7 +40,7 @@ if($WEBROOT{0}!=='/'){
 }
 
 // set the right include path
-set_include_path(get_include_path().PATH_SEPARATOR.$SERVERROOT.PATH_SEPARATOR.$SERVERROOT.'/inc'.PATH_SEPARATOR.$SERVERROOT.'/config');
+// set_include_path(get_include_path().PATH_SEPARATOR.$SERVERROOT.PATH_SEPARATOR.$SERVERROOT.'/inc'.PATH_SEPARATOR.$SERVERROOT.'/config');
 
 // define default config values
 $CONFIG_INSTALLED=false;
@@ -51,7 +51,7 @@ $CONFIG_DBNAME='owncloud';
 $CONFIG_DBTYPE='sqlite';
 
 // include the generated configfile
-@include_once('config.php');
+@oc_include_once('config.php');
 
 // redirect to https site if configured
 if(isset($CONFIG_HTTPFORCESSL) and $CONFIG_HTTPFORCESSL){
@@ -63,10 +63,10 @@ if(isset($CONFIG_HTTPFORCESSL) and $CONFIG_HTTPFORCESSL){
 }
 
 // load core libs
-require_once('lib_files.php');
-require_once('lib_log.php');
-require_once('lib_config.php');
-require_once('lib_user.php');
+oc_require_once('lib_files.php');
+oc_require_once('lib_log.php');
+oc_require_once('lib_config.php');
+oc_require_once('lib_user.php');
 
 if(OC_USER::isLoggedIn()){
 	//jail the user in a seperate data folder
@@ -131,7 +131,7 @@ class OC_UTIL {
   public static function showheader(){
     global $CONFIG_ADMINLOGIN;
     global $WEBROOT;
-    require('templates/header.php');;
+    oc_require('templates/header.php');;
   }
 
   /**
@@ -141,7 +141,7 @@ class OC_UTIL {
   public static function showfooter(){
     global $CONFIG_FOOTEROWNERNAME;
     global $CONFIG_FOOTEROWNEREMAIL;
-    require('templates/footer.php');;
+    oc_require('templates/footer.php');;
   }
 
   /**
@@ -188,7 +188,7 @@ class OC_UTIL {
    */
   public static function showloginform(){
     global $loginresult;
-    require('templates/loginform.php');
+    oc_require('templates/loginform.php');
   }
 
 
@@ -452,4 +452,101 @@ class OC_DB {
 }
 
 
-?>
+//custom require/include functions because not all hosts allow us to set the include path
+function oc_require($file){
+	global $SERVERROOT;
+	global $DOCUMENTROOT;
+	global $WEBROOT;
+	global $CONFIG_DBNAME;
+	global $CONFIG_DBHOST;
+	global $CONFIG_DBUSER;
+	global $CONFIG_DBPASSWORD;
+	global $CONFIG_DBTYPE;
+	global $CONFIG_DATADIRECTORY;
+	global $CONFIG_HTTPFORCESSL;
+	global $CONFIG_DATEFORMAT;
+	global $CONFIG_INSTALLED;
+	if(is_file($file)){
+		require($file);
+	}elseif(is_file($SERVERROOT.'/'.$file)){
+		require($SERVERROOT.'/'.$file);
+	}elseif(is_file($SERVERROOT.'/inc/'.$file)){
+		require($SERVERROOT.'/inc/'.$file);
+	}elseif(is_file($SERVERROOT.'/config/'.$file)){
+		require($SERVERROOT.'/config/'.$file);
+	}
+}
+
+function oc_require_once($file){
+	global $SERVERROOT;
+	global $DOCUMENTROOT;
+	global $WEBROOT;
+	global $CONFIG_DBNAME;
+	global $CONFIG_DBHOST;
+	global $CONFIG_DBUSER;
+	global $CONFIG_DBPASSWORD;
+	global $CONFIG_DBTYPE;
+	global $CONFIG_DATADIRECTORY;
+	global $CONFIG_HTTPFORCESSL;
+	global $CONFIG_DATEFORMAT;
+	global $CONFIG_INSTALLED;
+	if(is_file($file)){
+		require_once($file);
+	}elseif(is_file($SERVERROOT.'/'.$file)){
+		require_once($SERVERROOT.'/'.$file);
+	}elseif(is_file($SERVERROOT.'/inc/'.$file)){
+		require_once($SERVERROOT.'/inc/'.$file);
+	}elseif(is_file($SERVERROOT.'/config/'.$file)){
+		require_once($SERVERROOT.'/config/'.$file);
+	}
+}
+
+function oc_include($file){
+	global $SERVERROOT;
+	global $DOCUMENTROOT;
+	global $WEBROOT;
+	global $CONFIG_DBNAME;
+	global $CONFIG_DBHOST;
+	global $CONFIG_DBUSER;
+	global $CONFIG_DBPASSWORD;
+	global $CONFIG_DBTYPE;
+	global $CONFIG_DATADIRECTORY;
+	global $CONFIG_HTTPFORCESSL;
+	global $CONFIG_DATEFORMAT;
+	global $CONFIG_INSTALLED;
+	if(is_file($file)){
+		include($file);
+	}elseif(is_file($SERVERROOT.'/'.$file)){
+		include($SERVERROOT.'/'.$file);
+	}elseif(is_file($SERVERROOT.'/inc/'.$file)){
+		include($SERVERROOT.'/inc/'.$file);
+	}elseif(is_file($SERVERROOT.'/config/'.$file)){
+		include($SERVERROOT.'/config/'.$file);
+	}
+}
+
+function oc_include_once($file){
+	global $SERVERROOT;
+	global $DOCUMENTROOT;
+	global $WEBROOT;
+	global $CONFIG_DBNAME;
+	global $CONFIG_DBHOST;
+	global $CONFIG_DBUSER;
+	global $CONFIG_DBPASSWORD;
+	global $CONFIG_DBTYPE;
+	global $CONFIG_DATADIRECTORY;
+	global $CONFIG_HTTPFORCESSL;
+	global $CONFIG_DATEFORMAT;
+	global $CONFIG_INSTALLED;
+	if(is_file($file)){
+		include_once($file);
+	}elseif(is_file($SERVERROOT.'/'.$file)){
+		include_once($SERVERROOT.'/'.$file);
+	}elseif(is_file($SERVERROOT.'/inc/'.$file)){
+		include_once($SERVERROOT.'/inc/'.$file);
+	}elseif(is_file($SERVERROOT.'/config/'.$file)){
+		include_once($SERVERROOT.'/config/'.$file);
+	}
+}
+
+?>
\ No newline at end of file
diff --git a/inc/lib_config.php b/inc/lib_config.php
index 70de1b96d7..130731b79f 100755
--- a/inc/lib_config.php
+++ b/inc/lib_config.php
@@ -11,7 +11,7 @@ class OC_CONFIG{
     global $CONFIG_HTTPFORCESSL;
     global $CONFIG_DATEFORMAT;
     global $CONFIG_DBNAME;
-    require('templates/configform.php');
+    oc_require('templates/configform.php');
   }
   
   /**
@@ -35,7 +35,7 @@ class OC_CONFIG{
 			}
 		}
     if($allow){
-		require('templates/adminform.php');
+		oc_require('templates/adminform.php');
 	}
   }
 
diff --git a/inc/lib_user.php b/inc/lib_user.php
index 30dbdcd2fe..37e5f0bc21 100644
--- a/inc/lib_user.php
+++ b/inc/lib_user.php
@@ -21,6 +21,12 @@
 * 
 */
 
+if(!$CONFIG_INSTALLED){
+	$_SESSION['user_id']=false;
+	$_SESSION['username']='';
+	$_SESSION['username_clean']='';
+}
+
 /**
  * Class for usermanagement
  *
@@ -174,10 +180,14 @@ class OC_USER {
 	public static function ingroup($username,$groupname){
 		$userid=OC_USER::getuserid($username);
 		$groupid=OC_USER::getgroupid($groupname);
-		$query="SELECT user_group_id FROM  `user_group` WHERE  `group_id` =  '$groupid '  AND `user_id` =  '$userid 'LIMIT 1";
-		$result=OC_DB::select($query);
-		if(isset($result[0]) && isset($result[0]['user_group_id'])){
-			return true;
+		if($groupid>0 and $userid>0){
+			$query="SELECT user_group_id FROM  `user_group` WHERE  `group_id` =  '$groupid '  AND `user_id` =  '$userid 'LIMIT 1";
+			$result=OC_DB::select($query);
+			if(isset($result[0]) && isset($result[0]['user_group_id'])){
+				return true;
+			}else{
+				return false;
+			}
 		}else{
 			return false;
 		}
diff --git a/inc/templates/adminform.php b/inc/templates/adminform.php
index 38d2b14a57..c5e0bca61d 100644
--- a/inc/templates/adminform.php
+++ b/inc/templates/adminform.php
@@ -49,7 +49,7 @@ function dbtypechange(){
 		<?php
 	}
 if($FIRSTRUN){?>
-<tr><td>admin login:</td><td><input type="text" name="adminlogin" size="30" class="formstyle" value="<?php echo($CONFIG_ADMINLOGIN);?>"></input></td></tr>
+<tr><td>admin login:</td><td><input type="text" name="adminlogin" size="30" class="formstyle" value=""></input></td></tr>
 <tr><td>admin password:</td><td><input type="password" name="adminpassword" size="30" class="formstyle"></input></td><td>(leave empty to keep current password)</td></tr>
 <tr><td>retype admin password:</td><td><input type="password" name="adminpassword2" size="30" class="formstyle"></input></td></tr>
 <?php
diff --git a/webdav/owncloud.php b/webdav/owncloud.php
index 6699526be2..ac831789a0 100755
--- a/webdav/owncloud.php
+++ b/webdav/owncloud.php
@@ -23,7 +23,7 @@
 
 
 require_once('../inc/lib_base.php');
-require_once('HTTP/WebDAV/Server/Filesystem.php');
+oc_require_once('HTTP/WebDAV/Server/Filesystem.php');
 
 
 ini_set('default_charset', 'UTF-8');