diff --git a/ReactNativeClient/src/base-model.js b/ReactNativeClient/src/base-model.js
index c535e8421e..e38903813d 100644
--- a/ReactNativeClient/src/base-model.js
+++ b/ReactNativeClient/src/base-model.js
@@ -33,6 +33,11 @@ class BaseModel {
 		return null;
 	}
 
+	static hasField(name) {
+		let fields = this.fieldNames();
+		return fields.indexOf(name) >= 0;
+	}
+
 	static fieldNames() {
 		return this.db().tableFieldNames(this.tableName());
 	}
@@ -62,17 +67,35 @@ class BaseModel {
 		return this.db().selectOne('SELECT * FROM ' + this.tableName() + ' WHERE id = ?', [id]);
 	}
 
+	static applyPatch(model, patch) {
+		model = Object.assign({}, model);
+		for (let n in patch) {
+			if (!patch.hasOwnProperty(n)) continue;
+			model[n] = patch[n];
+		}
+		return model;
+	}
+
 	static saveQuery(o, isNew = 'auto') {
 		if (isNew == 'auto') isNew = !o.id;
 		let query = '';
 		let itemId = o.id;
 
+		if (!o.updated_time && this.hasField('updated_time')) {
+			o.updated_time = Math.round((new Date()).getTime() / 1000);
+		}
+
 		if (isNew) {
 			if (this.useUuid() && !o.id) {
 				o = Object.assign({}, o);
 				itemId = uuid.create();
 				o.id = itemId;
 			}
+
+			if (!o.created_time && this.hasField('created_time')) {
+				o.created_time = Math.round((new Date()).getTime() / 1000);
+			}
+
 			query = Database.insertQuery(this.tableName(), o);
 		} else {
 			let where = { id: o.id };
diff --git a/ReactNativeClient/src/components/folder-list.js b/ReactNativeClient/src/components/folder-list.js
index 63856acedb..09322afb22 100644
--- a/ReactNativeClient/src/components/folder-list.js
+++ b/ReactNativeClient/src/components/folder-list.js
@@ -4,24 +4,29 @@ import { ListView, Text, TouchableHighlight } from 'react-native';
 import { Log } from 'src/log.js';
 import { ItemListComponent } from 'src/components/item-list.js';
 import { Note } from 'src/models/note.js';
+import { Folder } from 'src/models/folder.js';
 import { _ } from 'src/locale.js';
 
 class FolderListComponent extends ItemListComponent {
 
 	listView_itemPress = (folderId) => {
-		Note.previews(folderId).then((notes) => {
-			this.props.dispatch({
-				type: 'NOTES_UPDATE_ALL',
-				notes: notes,
-			});
+		Folder.load(folderId).then((folder) => {
+			Log.info('Current folder', folder);
 
-			this.props.dispatch({
-				type: 'Navigation/NAVIGATE',
-				routeName: 'Notes',
-				folderId: folderId,
+			Note.previews(folderId).then((notes) => {
+				this.props.dispatch({
+					type: 'NOTES_UPDATE_ALL',
+					notes: notes,
+				});
+
+				this.props.dispatch({
+					type: 'Navigation/NAVIGATE',
+					routeName: 'Notes',
+					folderId: folderId,
+				});
+			}).catch((error) => {
+				Log.warn('Cannot load notes', error);
 			});
-		}).catch((error) => {
-			Log.warn('Cannot load notes', error);
 		});
 	}
 
diff --git a/ReactNativeClient/src/database.js b/ReactNativeClient/src/database.js
index 5b874d9299..6888009002 100644
--- a/ReactNativeClient/src/database.js
+++ b/ReactNativeClient/src/database.js
@@ -110,7 +110,7 @@ class Database {
 	}
 
 	open() {
-		this.db_ = SQLite.openDatabase({ name: '/storage/emulated/0/Download/joplin-12.sqlite' }, (db) => {
+		this.db_ = SQLite.openDatabase({ name: '/storage/emulated/0/Download/joplin-15.sqlite' }, (db) => {
 			Log.info('Database was open successfully');
 		}, (error) => {
 			Log.error('Cannot open database: ', error);
diff --git a/ReactNativeClient/src/synchronizer.js b/ReactNativeClient/src/synchronizer.js
index f6323b5a59..d232d89369 100644
--- a/ReactNativeClient/src/synchronizer.js
+++ b/ReactNativeClient/src/synchronizer.js
@@ -42,12 +42,24 @@ class Synchronizer {
 								let folder = Folder.fromApiResult(syncOp.item);
 								// TODO: automatically handle NULL fields by checking type and default value of field
 								if (!folder.parent_id) folder.parent_id = '';
-								return Folder.save(folder, { isNew: true });
+								return Folder.save(folder, { isNew: true, trackChanges: false });
 							});
 						}
 
-						// TODO: update
-						// TODO: delete
+						if (syncOp.type == 'update') {
+							chain.push(() => {
+								return Folder.load(syncOp.item_id).then((folder) => {
+									folder = Folder.applyPatch(folder, syncOp.item);
+									return Folder.save(folder, { trackChanges: false });
+								});
+							});
+						}
+
+						if (syncOp.type == 'delete') {
+							chain.push(() => {
+								return Folder.delete(syncOp.item_id, { trackChanges: false });
+							});
+						}
 					}
 				}
 				return promiseChain(chain);
@@ -65,7 +77,6 @@ class Synchronizer {
 		} else if (state == 'uploadingChanges') {
 			Change.all().then((changes) => {
 				let mergedChanges = Change.mergeChanges(changes);
-				// Log.info(mergedChanges);
 				let chain = [];
 				let processedChangeIds = [];
 				for (let i = 0; i < mergedChanges.length; i++) {
@@ -73,8 +84,6 @@ class Synchronizer {
 					chain.push(() => {
 						let p = null;
 
-						Log.info(this.api());
-
 						if (c.type == Change.TYPE_NOOP) {
 							p = Promise.resolve();
 						} else if (c.type == Change.TYPE_CREATE) {
@@ -86,9 +95,7 @@ class Synchronizer {
 								return this.api().patch('folders/' + folder.id, null, folder);
 							});
 						} else if (c.type == Change.TYPE_DELETE) {
-							p = Folder.load(c.item_id).then((folder) => {
-								return this.api().delete('folders/' + folder.id);
-							});
+							return this.api().delete('folders/' + c.item_id);
 						}
 
 						return p.then(() => {
diff --git a/debug_client/index.php b/debug_client/index.php
index dfdf7bdac0..3c4dc8cde7 100755
--- a/debug_client/index.php
+++ b/debug_client/index.php
@@ -67,10 +67,15 @@ function execRequest($method, $path, $query = array(), $data = null) {
 	curl_setopt($ch, CURLOPT_URL, $url);
 	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
 	curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
-	if ($data) curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
 	if ($method != 'GET' && $method != 'POST') {
 		curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $method);
 	}
+	if ($method == 'PUT' || $method == 'PATCH') {
+		curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/x-www-form-urlencoded'));
+	}
+	if ($data) {
+		curl_setopt($ch, CURLOPT_POSTFIELDS, $method == 'POST' ? $data : http_build_query($data));
+	}
 	$response = curl_exec($ch);
 	curl_close($ch);
 
diff --git a/src/AppBundle/Model/BaseModel.php b/src/AppBundle/Model/BaseModel.php
index b900625e02..4942d2612b 100755
--- a/src/AppBundle/Model/BaseModel.php
+++ b/src/AppBundle/Model/BaseModel.php
@@ -147,6 +147,8 @@ class BaseModel extends \Illuminate\Database\Eloquent\Model {
 		foreach ($array as $k => $v) {
 			if ($k == 'rev_id') {
 				$this->revId = $v;
+			} else if (in_array($k, array('parent_id', 'client_id', 'item_id', 'user_id', 'owner_id'))) {
+				$this->{$k} = self::unhex($v);
 			} else if (in_array($k, $this->diffableFields)) {
 				$this->changedDiffableFields[$k] = $v;
 			} else {
@@ -160,7 +162,7 @@ class BaseModel extends \Illuminate\Database\Eloquent\Model {
 		if ($this->useUuid) {
 			$output['id'] = self::hex($output['id']);
 		}
-		
+
 		if (!empty($output['parent_id'])) $output['parent_id'] = self::hex($output['parent_id']);
 		if (!empty($output['owner_id'])) $output['owner_id'] = self::hex($output['owner_id']);
 		if (!empty($output['client_id'])) $output['client_id'] = self::hex($output['client_id']);
@@ -246,7 +248,7 @@ class BaseModel extends \Illuminate\Database\Eloquent\Model {
 
 	static public function unhex($s) {
 		if (!strlen($s)) return null;
-		
+
 		if (is_array($s)) {
 			foreach ($s as $k => $v) {
 				$s[$k] = self::unhex($v);
@@ -373,9 +375,9 @@ class BaseModel extends \Illuminate\Database\Eloquent\Model {
 			unset($changedFields['updated_time']);
 		}
 
-			$output = parent::save($options);
+		//if ($this->parent_id
 
-		//$this->cacheClear();
+		$output = parent::save($options);
 
 		$this->isNew = null;
 
diff --git a/src/AppBundle/Model/Change.php b/src/AppBundle/Model/Change.php
index 2b9fc2e5c2..7dd3ad8ac4 100755
--- a/src/AppBundle/Model/Change.php
+++ b/src/AppBundle/Model/Change.php
@@ -26,6 +26,8 @@ class Change extends BaseModel {
 		               ->limit($limit + 1)
 		               ->get();
 
+		$changes = $changes->all();
+
 		$hasMore = $limit < count($changes);
 		if ($hasMore) array_pop($changes);
 
diff --git a/web/app.php b/web/app.php
index e70cb69ec0..a8170033d7 100755
--- a/web/app.php
+++ b/web/app.php
@@ -37,5 +37,7 @@ try {
 		header('HTTP/1.1 500 Internal Server Error');
 	}
 
-	die(json_encode($response) . "\n");
+	$r = json_encode($response);
+	if ($r === false) $r = serialize($response);
+	die($r . "\n");
 }
\ No newline at end of file