diff --git a/chrome/content/zotero/xpcom/connector/repo.js b/chrome/content/zotero/xpcom/connector/repo.js
index 709971d36..d74d89f67 100644
--- a/chrome/content/zotero/xpcom/connector/repo.js
+++ b/chrome/content/zotero/xpcom/connector/repo.js
@@ -66,10 +66,12 @@ Zotero.Repo = new function() {
 			}
 			
 			// then try repo
-			Zotero.HTTP.doGet(ZOTERO_CONFIG.REPOSITORY_URL+"/code/"+ZOTERO_CONFIG.REPOSITORY_CHANNEL+"/"+translatorID, function(xmlhttp) {
-				_haveCode(xmlhttp.status === 200 ? xmlhttp.responseText : false, translatorID,
-					Zotero.Repo.SOURCE_REPO, callback);
-			});
+			Zotero.HTTP.doGet(ZOTERO_CONFIG.REPOSITORY_URL+"/code/"+translatorID+"?version="+Zotero.version,
+				function(xmlhttp) {
+					_haveCode(xmlhttp.status === 200 ? xmlhttp.responseText : false, translatorID,
+						Zotero.Repo.SOURCE_REPO, callback);
+				}
+			);
 		});
 	};
 	
@@ -135,7 +137,7 @@ Zotero.Repo = new function() {
 	 * Retrieve metadata from repository
 	 */
 	function _updateFromRepo(reset, callback) {
-		var url = ZOTERO_CONFIG.REPOSITORY_URL+"/metadata?last="+
+		var url = ZOTERO_CONFIG.REPOSITORY_URL+"/metadata?version="+Zotero.version+"&last="+
 				(reset ? "0" : Zotero.Prefs.get("connector.repo.lastCheck.repoTime"));
 		
 		Zotero.HTTP.doGet(url, function(xmlhttp) {
diff --git a/chrome/content/zotero/xpcom/connector/translator.js b/chrome/content/zotero/xpcom/connector/translator.js
index caf4a31bb..3418f90e2 100644
--- a/chrome/content/zotero/xpcom/connector/translator.js
+++ b/chrome/content/zotero/xpcom/connector/translator.js
@@ -243,7 +243,9 @@ Zotero.Translators = new function() {
 		if(!newMetadata.length) return;
 		
 		if(reset) {
-			var serializedTranslators = newMetadata;
+			var serializedTranslators = newMetadata.filter(function(translator) {
+				return !translator.deleted;
+			});
 		} else {
 			var serializedTranslators = [];
 			var hasChanged = false;
@@ -252,7 +254,10 @@ Zotero.Translators = new function() {
 			for(var i in newMetadata) {
 				var newTranslator = newMetadata[i];
 				
-				if(_translators.hasOwnProperty(newTranslator.translatorID)) {
+				if(newTranslator.deleted) {
+					// handle translator deletions
+					delete _translators[newTranslator.translatorID];
+				} else if(_translators.hasOwnProperty(newTranslator.translatorID)) {
 					var oldTranslator = _translators[newTranslator.translatorID];
 					
 					// check whether translator has changed
@@ -395,7 +400,7 @@ Zotero.Translator.prototype.init = function(info) {
 	for(var i in TRANSLATOR_REQUIRED_PROPERTIES) {
 		var property = TRANSLATOR_REQUIRED_PROPERTIES[i];
 		if(info[property] === undefined) {
-			this.logError('Missing property "'+property+'" in translator metadata JSON object in ' + info.label);
+			Zotero.logError(new Error('Missing property "'+property+'" in translator metadata JSON object in ' + info.label));
 			haveMetadata = false;
 			break;
 		} else {
diff --git a/chrome/content/zotero/xpcom/zotero.js b/chrome/content/zotero/xpcom/zotero.js
index 820a5fe23..2f4cbbd02 100644
--- a/chrome/content/zotero/xpcom/zotero.js
+++ b/chrome/content/zotero/xpcom/zotero.js
@@ -29,7 +29,6 @@ const ZOTERO_CONFIG = {
 	REPOSITORY_URL: 'https://repo.zotero.org/repo',
 	REPOSITORY_CHECK_INTERVAL: 86400, // 24 hours
 	REPOSITORY_RETRY_INTERVAL: 3600, // 1 hour
-	REPOSITORY_CHANNEL: 'trunk',
 	BASE_URI: 'http://zotero.org/',
 	WWW_BASE_URL: 'http://www.zotero.org/',
 	SYNC_URL: 'https://sync.zotero.org/',
@@ -2275,10 +2274,13 @@ Zotero.Browser = new function() {
 		hiddenBrowser.setAttribute('disablehistory', 'true');
 		win.document.documentElement.appendChild(hiddenBrowser);
 		// Disable some features
+		hiddenBrowser.docShell.allowAuth = false;
+		hiddenBrowser.docShell.allowDNSPrefetch = false;
 		hiddenBrowser.docShell.allowImages = false;
 		hiddenBrowser.docShell.allowJavascript = false;
 		hiddenBrowser.docShell.allowMetaRedirects = false;
 		hiddenBrowser.docShell.allowPlugins = false;
+		hiddenBrowser.docShell.canExecuteScripts = false;
 		Zotero.debug("created hidden browser ("
 			+ (win.document.getElementsByTagName('browser').length - 1) + ")");
 		return hiddenBrowser;