diff --git a/apps/files/appinfo/remote.php b/apps/files/appinfo/remote.php
index 9f29079620..ef22fe9218 100644
--- a/apps/files/appinfo/remote.php
+++ b/apps/files/appinfo/remote.php
@@ -52,6 +52,7 @@ $server->addPlugin(new OC_Connector_Sabre_FilesPlugin());
 $server->addPlugin(new OC_Connector_Sabre_AbortedUploadDetectionPlugin());
 $server->addPlugin(new OC_Connector_Sabre_QuotaPlugin());
 $server->addPlugin(new OC_Connector_Sabre_MaintenancePlugin());
+$server->addPlugin(new OC_Connector_Sabre_ExceptionLoggerPlugin('webdav'));
 
 // And off we go!
 $server->exec();
diff --git a/lib/private/connector/sabre/exceptionloggerplugin.php b/lib/private/connector/sabre/exceptionloggerplugin.php
new file mode 100644
index 0000000000..8e77afaf20
--- /dev/null
+++ b/lib/private/connector/sabre/exceptionloggerplugin.php
@@ -0,0 +1,50 @@
+<?php
+
+/**
+ * ownCloud
+ *
+ * @author Vincent Petry
+ * @copyright 2014 Vincent Petry <pvince81@owncloud.com>
+ *
+ * @license AGPL3
+ */
+
+class OC_Connector_Sabre_ExceptionLoggerPlugin extends Sabre_DAV_ServerPlugin
+{
+	private $appName;
+
+	/**
+	 * @param string $loggerAppName app name to use when logging
+	 */
+	public function __construct($loggerAppName = 'webdav') {
+		$this->appName = $loggerAppName;
+	}
+
+	/**
+	 * This initializes the plugin.
+	 *
+	 * This function is called by Sabre_DAV_Server, after
+	 * addPlugin is called.
+	 *
+	 * This method should set up the required event subscriptions.
+	 *
+	 * @param Sabre_DAV_Server $server
+	 * @return void
+	 */
+	public function initialize(Sabre_DAV_Server $server) {
+
+		$server->subscribeEvent('exception', array($this, 'logException'), 10);
+	}
+
+	/**
+	 * Log exception
+	 *
+	 * @internal param Exception $e exception
+	 */
+	public function logException($e) {
+		$exceptionClass = get_class($e);
+		if ($exceptionClass !== 'Sabre_DAV_Exception_NotAuthenticated') {
+			\OCP\Util::logException($this->appName, $e);
+		}
+	}
+}
diff --git a/lib/private/connector/sabre/file.php b/lib/private/connector/sabre/file.php
index c3b5900729..ed27cef440 100644
--- a/lib/private/connector/sabre/file.php
+++ b/lib/private/connector/sabre/file.php
@@ -79,7 +79,7 @@ class OC_Connector_Sabre_File extends OC_Connector_Sabre_Node implements Sabre_D
 				\OC_Log::write('webdav', '\OC\Files\Filesystem::file_put_contents() failed', \OC_Log::ERROR);
 				$fs->unlink($partpath);
 				// because we have no clue about the cause we can only throw back a 500/Internal Server Error
-				throw new Sabre_DAV_Exception();
+				throw new Sabre_DAV_Exception('Could not write file contents');
 			}
 		} catch (\OCP\Files\NotPermittedException $e) {
 			// a more general case - due to whatever reason the content could not be written
@@ -105,7 +105,7 @@ class OC_Connector_Sabre_File extends OC_Connector_Sabre_Node implements Sabre_D
 		if ($renameOkay === false || $fileExists === false) {
 			\OC_Log::write('webdav', '\OC\Files\Filesystem::rename() failed', \OC_Log::ERROR);
 			$fs->unlink($partpath);
-			throw new Sabre_DAV_Exception();
+			throw new Sabre_DAV_Exception('Could not rename part file to final file');
 		}
 
 		// allow sync clients to send the mtime along in a header
@@ -246,7 +246,7 @@ class OC_Connector_Sabre_File extends OC_Connector_Sabre_Node implements Sabre_D
 				if ($fileExists) {
 					$fs->unlink($targetPath);
 				}
-				throw new Sabre_DAV_Exception();
+				throw new Sabre_DAV_Exception('Could not rename part file assembled from chunks');
 			}
 
 			// allow sync clients to send the mtime along in a header
diff --git a/lib/public/util.php b/lib/public/util.php
index 8e85f9afc3..e893a76d81 100644
--- a/lib/public/util.php
+++ b/lib/public/util.php
@@ -88,14 +88,18 @@ class Util {
 	 * @param Exception $ex exception to log
 	 */
 	public static function logException( $app, \Exception $ex ) {
-		$message = $ex->getMessage();
+		$class = get_class($ex);
+		if ($class !== 'Exception') {
+			$message = $class . ': ';
+		}
+		$message .= $ex->getMessage();
 		if ($ex->getCode()) {
 			$message .= ' [' . $ex->getCode() . ']';
 		}
 		\OCP\Util::writeLog($app, 'Exception: ' . $message, \OCP\Util::FATAL);
 		if (defined('DEBUG') and DEBUG) {
 			// also log stack trace
-			$stack = explode('#', $ex->getTraceAsString());
+			$stack = explode("\n", $ex->getTraceAsString());
 			// first element is empty
 			array_shift($stack);
 			foreach ($stack as $s) {