diff --git a/docs/upgrading/index.rst b/docs/upgrading/index.rst
index 12c1b3d1e0..6563835e86 100644
--- a/docs/upgrading/index.rst
+++ b/docs/upgrading/index.rst
@@ -78,7 +78,13 @@ All of the textual data stored in NodeBB is found in a ``.rdb`` file. On typical
 Backing up MongoDB
 ~~~~~~~~~~~~~~
 
-TBA
+To run a backup of your complete MongoDB you can simply run
+
+    mongodump
+
+which will create a directory structure that can be restored with the `mongorestore` command.
+
+It is recommended that you first shut down your database. On Debian / Ubuntu it's likely to be: `sudo service mongodb stop`
 
 Backing up LevelDB
 ~~~~~~~~~~~~~~
diff --git a/minifier.js b/minifier.js
index b4354db0ba..3bbfcff2e1 100644
--- a/minifier.js
+++ b/minifier.js
@@ -1,3 +1,5 @@
+"use strict";
+
 var uglifyjs = require('uglify-js'),
 	less = require('less'),
 	async = require('async'),
@@ -9,10 +11,23 @@ var uglifyjs = require('uglify-js'),
 	};
 
 /* Javascript */
-Minifier.js.minify = function (scripts, callback) {
+Minifier.js.minify = function (scripts, minify, callback) {
+	var options = {};
+
+	if (!minify) {
+		options.sourceMapURL = '/nodebb.min.js.map';
+		options.outSourceMap = 'nodebb.min.js.map';
+		options.mangle = false;
+		options.compress = false;
+		options.prefix = 6;
+	}
+
 	try {
-		var minified = uglifyjs.minify(scripts);
-		callback(minified.code);
+		var minified = uglifyjs.minify(scripts, options);
+		callback({
+			js: minified.code,
+			map: minified.map
+		});
 	} catch(err) {
 		process.send({
 			action: 'error',
@@ -21,22 +36,22 @@ Minifier.js.minify = function (scripts, callback) {
 	}
 };
 
-Minifier.js.concatenate = function(scripts, callback) {
-	async.map(scripts, function(path, next) {
-		fs.readFile(path, { encoding: 'utf-8' }, next);
-	}, function(err, contents) {
-		if (err) {
-			process.send({
-				action: 'error',
-				error: err
-			});
-		} else {
-			callback(contents.reduce(function(output, src) {
-				return output.length ? output + ';\n' + src : src;
-			}, ''));
-		}
-	});
-};
+// Minifier.js.concatenate = function(scripts, callback) {
+// 	async.map(scripts, function(path, next) {
+// 		fs.readFile(path, { encoding: 'utf-8' }, next);
+// 	}, function(err, contents) {
+// 		if (err) {
+// 			process.send({
+// 				action: 'error',
+// 				error: err
+// 			});
+// 		} else {
+// 			callback(contents.reduce(function(output, src) {
+// 				return output.length ? output + ';\n' + src : src;
+// 			}, ''));
+// 		}
+// 	});
+// };
 
 process.on('message', function(payload) {
 	var	executeCallback = function(data) {
@@ -47,12 +62,8 @@ process.on('message', function(payload) {
 		};
 
 	switch(payload.action) {
-		case 'js.minify':
-			Minifier.js.minify(payload.scripts, executeCallback);
-		break;
-
-		case 'js.concatenate':
-			Minifier.js.concatenate(payload.scripts, executeCallback);
+	case 'js':
+		Minifier.js.minify(payload.scripts, payload.minify, executeCallback);
 		break;
 	}
-})
+});
diff --git a/package.json b/package.json
index 6deb214229..286eadfd3a 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "rss": "~0.2.0",
     "request": "~2.34.0",
     "prompt": "~0.2.11",
-    "uglify-js": "~2.4.0",
+    "uglify-js": "git+https://github.com/julianlam/UglifyJS2.git",
     "validator": "~3.4.0",
     "cron": "~1.0.4",
     "semver": "~2.2.1",
diff --git a/public/src/translator.js b/public/src/translator.js
index 20d8db2129..d6b753f0ef 100644
--- a/public/src/translator.js
+++ b/public/src/translator.js
@@ -22,7 +22,7 @@
 
 	translator.prepareDOM = function() {
 		// Load the appropriate timeago locale file
-		if (config.defaultLang !== 'en_GB') {
+		if (config.defaultLang !== 'en_GB' && config.defaultLang !== 'en_US') {
 			// Correct NodeBB language codes to timeago codes, if necessary
 			var	languageCode;
 			switch(config.defaultLang) {
diff --git a/src/meta.js b/src/meta.js
index 322180c647..9a94046da8 100644
--- a/src/meta.js
+++ b/src/meta.js
@@ -323,7 +323,8 @@ var fs = require('fs'),
 			minifier.on('message', function(payload) {
 				if (payload.action !== 'error') {
 					winston.info('[meta/js] Compilation complete');
-					Meta.js.cache = payload.data;
+					Meta.js.cache = payload.data.js;
+					Meta.js.map = payload.data.map;
 					minifier.kill();
 				} else {
 					winston.error('[meta/js] Could not compile client-side scripts!');
@@ -336,7 +337,8 @@ var fs = require('fs'),
 			Meta.js.loadRJS(function() {
 				Meta.js.prepare(function() {
 					minifier.send({
-						action: minify ? 'js.minify' : 'js.concatenate',
+						action: 'js',
+						minify: minify,
 						scripts: Meta.js.scripts
 					});
 				});
diff --git a/src/routes/meta.js b/src/routes/meta.js
index 79e757c3af..cfe258022a 100644
--- a/src/routes/meta.js
+++ b/src/routes/meta.js
@@ -11,18 +11,47 @@ var path = require('path'),
 
 
 function sendMinifiedJS(req, res, next) {
+	if (!minificationEnabled) {
+		res.set('X-SourceMap', '/nodebb.min.js.map');
+	}
+
 	return res.type('text/javascript').send(meta.js.cache);
 }
 
+function sendSourceMap(req, res) {
+	return res.type('application/json').send(meta.js.map);
+}
+
 function sendStylesheet(req, res, next) {
 	res.type('text/css').send(200, meta.css.cache);
 }
 
-module.exports = function(app, middleware, controllers) {
-	minificationEnabled = app.enabled('minification');
+function setupPluginSourceMapping(app) {
+	/*
+		These mappings are utilised by the source map file, as client-side
+		scripts defined in `scripts` in plugin.json are not normally
+		served to the end-user. These mappings are only accessible via
+		development mode (`./nodebb dev`)
+	*/
+	var	routes = plugins.clientScripts,
+		mapping;
+
+	routes.forEach(function(route) {
+		mapping = '/' + route.split('/').slice(7).join('/');
+		app.get(mapping, function(req, res) {
+			res.type('text/javascript').sendfile(route);
+		});
+	});
+}
 
+module.exports = function(app, middleware, controllers) {
 	app.get('/stylesheet.css', sendStylesheet);
 	app.get('/nodebb.min.js', sendMinifiedJS);
 	app.get('/sitemap.xml', controllers.sitemap);
 	app.get('/robots.txt', controllers.robots);
+
+	if (!minificationEnabled) {
+		app.get('/nodebb.min.js.map', sendSourceMap);
+		setupPluginSourceMapping(app);
+	}
 };