diff --git a/apps/user_webfinger/appinfo/install.php b/apps/user_webfinger/appinfo/install.php
index 079043cd10..f570a3a249 100644
--- a/apps/user_webfinger/appinfo/install.php
+++ b/apps/user_webfinger/appinfo/install.php
@@ -3,4 +3,4 @@ $appInfoDir = __DIR__;
 $thisAppDir = dirname($appInfoDir);
 $appsDir = dirname($thisAppDir);
 $ownCloudDir = dirname($appsDir);
-symlink($thisAppDir, $ownCloudDir.'/.well-known');
+@symlink($thisAppDir, $ownCloudDir.'/.well-known');
diff --git a/lib/filesystem.php b/lib/filesystem.php
index 627f494c93..44401260c5 100644
--- a/lib/filesystem.php
+++ b/lib/filesystem.php
@@ -283,7 +283,7 @@ class OC_Filesystem{
 		return self::basicOperation('unlink',$path,array('delete'));
 	}
 	static public function rename($path1,$path2){
-		if(OC_FileProxy::runPreProxies('rename',$path1,$path2) and self::is_writeable($path1) and self::is_writeable($path2)){
+		if(OC_FileProxy::runPreProxies('rename',$path1,$path2) and self::is_writeable($path1) and self::isValidPath($path2)){
 			$run=true;
 			OC_Hook::emit( 'OC_Filesystem', 'rename', array( 'oldpath' => $path1 ,'newpath'=>$path2, 'run' => &$run));
 			if($run){
@@ -304,7 +304,7 @@ class OC_Filesystem{
 		}
 	}
 	static public function copy($path1,$path2){
-		if(OC_FileProxy::runPreProxies('copy',$path1,$path2) and self::is_readable($path1) and self::is_writeable($path2)){
+		if(OC_FileProxy::runPreProxies('copy',$path1,$path2) and self::is_readable($path1) and self::isValidPath($path2)){
 			$run=true;
 			OC_Hook::emit( 'OC_Filesystem', 'copy', array( 'oldpath' => $path1 ,'newpath'=>$path2, 'run' => &$run));
 			$exists=self::file_exists($path2);
@@ -365,7 +365,7 @@ class OC_Filesystem{
 		}
 	}
 	static public function fromTmpFile($tmpFile,$path){
-		if(OC_FileProxy::runPreProxies('copy',$tmpFile,$path) and self::is_writeable($path) and $storage=self::getStorage($path)){
+		if(OC_FileProxy::runPreProxies('copy',$tmpFile,$path) and self::isValidPath($path) and $storage=self::getStorage($path)){
 			$run=true;
 			$exists=self::file_exists($path);
 			if(!$exists){
@@ -385,7 +385,7 @@ class OC_Filesystem{
 		}
 	}
 	static public function fromUploadedFile($tmpFile,$path){
-		if(OC_FileProxy::runPreProxies('fromUploadedFile',$tmpFile,$path) and self::is_writeable($path) and $storage=self::getStorage($path)){
+		if(OC_FileProxy::runPreProxies('fromUploadedFile',$tmpFile,$path) and self::isValidPath($path) and $storage=self::getStorage($path)){
 			$run=true;
 			$exists=self::file_exists($path);
 			if(!$exists){
diff --git a/lib/image.php b/lib/image.php
index e09486be08..45b6ad3918 100644
--- a/lib/image.php
+++ b/lib/image.php
@@ -42,8 +42,7 @@ function ellipsis($str, $maxlen) {
 }
 
 /**
- * Class for image manipulation
- * Ideas: imagerotate, chunk_split(base64_encode())
+ * Class for basic image manipulation
  *
  */
 class OC_Image {
@@ -125,7 +124,7 @@ class OC_Image {
 	*/
 
 	public function save($filepath=null) {
-		if($filepath === null && $this->filepath === null) {
+		if($filepath === null && self::$filepath === null) {
 			OC_Log::write('core','OC_Image::save. save() called with no path.', OC_Log::ERROR);
 			return false;
 		} elseif($filepath === null && $this->filepath !== null) {
@@ -138,15 +137,15 @@ class OC_Image {
 	* @brief Outputs/saves the image.
 	*/
 	private function _output($filepath=null, $really=false) {
-		header('Content-Type: '.self::mimeType());
 		if($really === false) {
+			header('Content-Type: '.self::mimeType());
 			$filepath = null; // Just being cautious ;-)
 		} else {
 			if(!is_writable(dirname($filepath))) {
-				OC_Log::write('core','OC_Image::save. Directory \''.dirname($filepath).'\' is not writable.', OC_Log::ERROR);
+				OC_Log::write('core','OC_Image::_output. Directory \''.dirname($filepath).'\' is not writable.', OC_Log::ERROR);
 				return false;
-			} elseif(is_writable(dirname($filepath)) && !is_writable($filepath)) {
-				OC_Log::write('core','OC_Image::save. File \''.$filepath.'\' is not writable.', OC_Log::ERROR);
+			} elseif(is_writable(dirname($filepath)) && file_exists($filepath) && !is_writable($filepath)) {
+				OC_Log::write('core','OC_Image::_output. File \''.$filepath.'\' is not writable.', OC_Log::ERROR);
 				return false;
 			}
 		}
@@ -200,6 +199,87 @@ class OC_Image {
 		return chunk_split(base64_encode(ob_get_clean()));
 	}
 
+	/**
+	* @brief Fixes orientation based on EXIF data.
+	* @returns bool.
+	*/
+	public function fixOrientation() {
+		if(!is_resource(self::$resource)) {
+			OC_Log::write('core','OC_Image::fixOrientation() No image loaded.', OC_Log::DEBUG);
+			return false;
+		}
+		if(is_null(self::$filepath) || !is_readable(self::$filepath)) {
+			OC_Log::write('core','OC_Image::fixOrientation() No readable file path set.', OC_Log::DEBUG);
+			return false;
+		}
+		$exif = exif_read_data(self::$filepath, 'IFD0');
+		if(!$exif) {
+			return false;
+		}
+		if(!isset($exif['Orientation'])) {
+			return true; // Nothing to fix
+		}
+		$o = $exif['Orientation'];
+		OC_Log::write('core','OC_Image::fixOrientation() Orientation: '.$o, OC_Log::DEBUG);
+		$rotate = 0;
+		$flip = false;
+		switch($o) {
+			case 1:
+				$rotate = 0;
+				$flip = false;
+				break;
+			case 2: // Not tested
+				$rotate = 0;
+				$flip = true;
+				break;
+			case 3:
+				$rotate = 180;
+				$flip = false;
+				break;
+			case 4: // Not tested
+				$rotate = 180;
+				$flip = true;
+				break;
+			case 5: // Not tested
+				$rotate = 90;
+				$flip = true;
+				break;
+			case 6:
+				//$rotate = 90;
+				$rotate = 270;
+				$flip = false;
+				break;
+			case 7: // Not tested
+				$rotate = 270;
+				$flip = true;
+				break;
+			case 8:
+				$rotate = 270;
+				$flip = false;
+				break;
+		}
+		if($rotate) {
+			$res = imagerotate(self::$resource, $rotate, -1);
+			if($res) {
+				if(imagealphablending($res, true)) {
+					if(imagesavealpha($res, true)) {
+						self::$resource = $res;
+						return true;
+					} else {
+						OC_Log::write('core','OC_Image::fixOrientation() Error during alphasaving.', OC_Log::DEBUG);
+						return false;
+					}
+				} else {
+					OC_Log::write('core','OC_Image::fixOrientation() Error during alphablending.', OC_Log::DEBUG);
+					return false;
+				}
+			} else {
+				OC_Log::write('core','OC_Image::fixOrientation() Error during oriention fixing.', OC_Log::DEBUG);
+				return false;
+			}
+		}
+	}
+
 	/**
 	* @brief Loads an image from a local file, a base64 encoded string or a resource created by an imagecreate* function.
 	* @param $imageref The path to a local file, a base64 encoded string or a resource created by an imagecreate* function.
diff --git a/lib/user.php b/lib/user.php
index 0a5881ec0f..34f44f572e 100644
--- a/lib/user.php
+++ b/lib/user.php
@@ -169,7 +169,8 @@ class OC_User {
 			foreach( OC_Group::getUserGroups( $uid ) as $i ){
 				OC_Group::removeFromGroup( $uid, $i );
 			}
-
+			// Delete the user's keys in preferences
+			OC_Preferences::deleteUser($uid);
 			// Emit and exit
 			OC_Hook::emit( "OC_User", "post_deleteUser", array( "uid" => $uid ));
 			return true;
diff --git a/lib/util.php b/lib/util.php
index 9cf78da6e9..009119b54a 100644
--- a/lib/util.php
+++ b/lib/util.php
@@ -175,7 +175,7 @@ class OC_Util {
 		$errors=array();
 
 		//check for database drivers
-		if(!is_callable('sqlite_open') and !is_callable('mysql_connect') and !is_callable('pg_connect')){
+		if(!(is_callable('sqlite_open') or class_exists('SQLite3')) and !is_callable('mysql_connect') and !is_callable('pg_connect')){
 			$errors[]=array('error'=>'No database drivers (sqlite, mysql, or postgresql) installed.<br/>','hint'=>'');//TODO: sane hint
 		}
 		$CONFIG_DBTYPE = OC_Config::getValue( "dbtype", "sqlite" );