diff --git a/chrome/content/zotero/xpcom/db.js b/chrome/content/zotero/xpcom/db.js
index 16cc74877..837800845 100644
--- a/chrome/content/zotero/xpcom/db.js
+++ b/chrome/content/zotero/xpcom/db.js
@@ -796,6 +796,7 @@ Zotero.DBConnection.prototype.closeDatabase = function () {
 		this.stopDummyStatement();
 		var deferred = Q.defer();
 		this._connection.asyncClose(deferred.resolve);
+		this._connection = undefined;
 		return deferred.promise;
 	} else {
 		return Q();
diff --git a/chrome/content/zotero/xpcom/zotero.js b/chrome/content/zotero/xpcom/zotero.js
index 04a540d8d..795824a3e 100644
--- a/chrome/content/zotero/xpcom/zotero.js
+++ b/chrome/content/zotero/xpcom/zotero.js
@@ -808,7 +808,7 @@ Components.utils.import("resource://gre/modules/Services.jsm");
 			// remove temp directory
 			Zotero.removeTempDirectory();
 			
-			if(Zotero.initialized && Zotero.DB) {
+			if(Zotero.DB && Zotero.DB._connection) {
 				Zotero.debug("Closing database");
 				
 				// run GC to finalize open statements
diff --git a/styles b/styles
index 01e0f42ae..c536a2c5c 160000
--- a/styles
+++ b/styles
@@ -1 +1 @@
-Subproject commit 01e0f42aee7595b7cccafe731de57f277c2b76df
+Subproject commit c536a2c5c28ca465b511733a849ae452822fd363
diff --git a/translators b/translators
index 330bcfa0a..6fcf964bf 160000
--- a/translators
+++ b/translators
@@ -1 +1 @@
-Subproject commit 330bcfa0ab1c501b71d82d56b1cad88523cea722
+Subproject commit 6fcf964bf91100f087d84f714c65f89b1f50397c