diff --git a/chrome/content/zotero/xpcom/openurl.js b/chrome/content/zotero/xpcom/openurl.js
index d28156275..b0545b612 100644
--- a/chrome/content/zotero/xpcom/openurl.js
+++ b/chrome/content/zotero/xpcom/openurl.js
@@ -243,6 +243,13 @@ Zotero.OpenURL = new function() {
 		if(asObj) return entries;
 		return entries.join("&");
 	}
+
+	function _cloneIfNecessary(obj1, obj2) {
+		if(Zotero.isFx && !Zotero.isBookmarklet && Zotero.platformMajorVersion >= 32) {
+			return Components.utils.cloneInto(obj1, obj2);
+		}
+		return obj1;
+	}
 	
 	/*
 	 * Generates an item in the format returned by item.fromArray() given an
@@ -380,14 +387,14 @@ Zotero.OpenURL = new function() {
 				if(complexAu.length && !lastCreator.lastName && !lastCreator.institutional) {
 					lastCreator.lastName = value;
 				} else {
-					complexAu.push({lastName:value, creatorType:(key == "rft.aulast" ? "author" : "inventor"), offset:item.creators.length});
+					complexAu.push(_cloneIfNecessary({lastName:value, creatorType:(key == "rft.aulast" ? "author" : "inventor"), offset:item.creators.length}, item));
 				}
 			} else if(key == "rft.aufirst" || key == "rft.invfirst") {
 				var lastCreator = complexAu[complexAu.length-1];
 				if(complexAu.length && !lastCreator.firstName && !lastCreator.institutional) {
 					lastCreator.firstName = value;
 				} else {
-					complexAu.push({firstName:value, creatorType:(key == "rft.aufirst" ? "author" : "inventor"), offset:item.creators.length});
+					complexAu.push(_cloneIfNecessary({firstName:value, creatorType:(key == "rft.aufirst" ? "author" : "inventor"), offset:item.creators.length}, item));
 				}
 			} else if(key == "rft.au" || key == "rft.creator" || key == "rft.contributor" || key == "rft.inventor") {
 				if(key == "rft.contributor") {
@@ -398,13 +405,9 @@ Zotero.OpenURL = new function() {
 					var type = "author";
 				}
 				
-				if(value.indexOf(",") !== -1) {
-					item.creators.push(Zotero.Utilities.cleanAuthor(value, type, true));
-				} else {
-					item.creators.push(Zotero.Utilities.cleanAuthor(value, type, false));
-				}
+				item.creators.push(_cloneIfNecessary(Zotero.Utilities.cleanAuthor(value, type, value.indexOf(",") !== -1), item));
 			} else if(key == "rft.aucorp") {
-				complexAu.push({lastName:value, isInstitution:true});
+				complexAu.push(_cloneIfNecessary({lastName:value, isInstitution:true}, item));
 			} else if(key == "rft.isbn" && !item.ISBN) {
 				item.ISBN = value;
 			} else if(key == "rft.pub" || key == "rft.publisher") {
diff --git a/chrome/content/zotero/xpcom/translation/translate_firefox.js b/chrome/content/zotero/xpcom/translation/translate_firefox.js
index 46204c6d4..bff1f2d00 100644
--- a/chrome/content/zotero/xpcom/translation/translate_firefox.js
+++ b/chrome/content/zotero/xpcom/translation/translate_firefox.js
@@ -462,16 +462,6 @@ Zotero.Translate.SandboxManager.prototype = {
 				if(isFunction) {
 					attachTo[localKey] = function() {
 						var args = Array.prototype.slice.apply(arguments);
-						if(Zotero.platformMajorVersion >= 32) {
-							// This is necessary on Nightly and works
-							// fine on 31, but apparently breaks
-							// ZU.xpath in an unusual way on 24
-							for(var i=0; i<args.length; i++) {
-								if(typeof args[i] === "object" && args[i] !== null && args[i].wrappedJSObject) {
-									args[i] = args[i].wrappedJSObject;
-								}
-							}
-						}
 						if(passAsFirstArgument) args.unshift(passAsFirstArgument);
 						return me._copyObject(object[localKey].apply(object, args));
 					};
diff --git a/chrome/content/zotero/xpcom/utilities.js b/chrome/content/zotero/xpcom/utilities.js
index c4808c982..c21ef09b5 100644
--- a/chrome/content/zotero/xpcom/utilities.js
+++ b/chrome/content/zotero/xpcom/utilities.js
@@ -910,6 +910,9 @@ Zotero.Utilities = {
 	 * @param	{Function}		onDone			Function to call when done
 	 */
 	 "processAsync":function (sets, callbacks, onDone) {
+		if(sets.wrappedJSObject) sets = sets.wrappedJSObject;
+		if(callbacks.wrappedJSObject) callbacks = callbacks.wrappedJSObject;
+
 		var currentSet;
 		var index = 0;