diff --git a/chrome/content/zotero/xpcom/translation/browser_firefox.js b/chrome/content/zotero/xpcom/translation/browser_firefox.js
index 9c0ea70bb..dc54da315 100644
--- a/chrome/content/zotero/xpcom/translation/browser_firefox.js
+++ b/chrome/content/zotero/xpcom/translation/browser_firefox.js
@@ -238,7 +238,7 @@ Zotero.Translate.IO.Read = function(file, mode) {
 }
 
 Zotero.Translate.IO.Read.prototype = {
-	"__exposedProps__":["getXML", "RDF", "read", "setCharacterSet"],
+	"__exposedProps__":["_getXML", "RDF", "read", "setCharacterSet"],
 	
 	"_seekToStart":function() {
 		this._rawStream.QueryInterface(Components.interfaces.nsISeekableStream)
@@ -309,11 +309,11 @@ Zotero.Translate.IO.Read.prototype = {
 		}
 	},
 	
-	"getXML":function() {
+	"_getXML":function() {
 		if(this._mode == "xml/dom") {
 			return Zotero.Translate.IO.parseDOMXML(this._rawStream, this._charset, this.file.fileSize);
 		} else {
-			return new XML(this._readToString().replace(/<\?xml[^>]+\?>/, ""));
+			return this._readToString().replace(/<\?xml[^>]+\?>/, "");
 		}
 	},
 	
diff --git a/chrome/content/zotero/xpcom/translation/translate.js b/chrome/content/zotero/xpcom/translation/translate.js
index 75a1be9f4..d4f06ef5b 100644
--- a/chrome/content/zotero/xpcom/translation/translate.js
+++ b/chrome/content/zotero/xpcom/translation/translate.js
@@ -814,7 +814,10 @@ Zotero.Translate.Base.prototype = {
 		"};"+
 		"Zotero.Item.prototype.complete = function() { Zotero._itemDone(this); };"+
 		"Zotero.Collection = function () {};"+
-		"Zotero.Collection.prototype.complete = function() { Zotero._collectionDone(this); };");
+		"Zotero.Collection.prototype.complete = function() { Zotero._collectionDone(this); };"+
+		// https://bugzilla.mozilla.org/show_bug.cgi?id=609143 - can't pass E4X to sandbox in Fx4
+		"Zotero.getXML = function() { return new XML(Zotero._getXML()); }"
+		);
 		
 		this._sandboxManager.importObject(this.Sandbox, this);
 		this._sandboxManager.importObject({"Utilities":new Zotero.Utilities.Translate(this)});
@@ -1312,7 +1315,7 @@ Zotero.Translate.IO.String = function(string, uri, mode) {
 }
 
 Zotero.Translate.IO.String.prototype = {
-	"__exposedProps__":["getXML", "RDF", "read", "write", "setCharacterSet", "getXML"],
+	"__exposedProps__":["RDF", "read", "write", "setCharacterSet", "_getXML"],
 	
 	"_initRDF":function() {
 		Zotero.debug("Translate: Initializing RDF data store");
@@ -1375,11 +1378,11 @@ Zotero.Translate.IO.String.prototype = {
 		this.string.length += data.length;
 	},
 	
-	"getXML":function() {
+	"_getXML":function() {
 		if(this._mode == "xml/dom") {
 			return Zotero.Translate.IO.parseDOMXML(this.string);
 		} else {
-			return new XML(this.string.replace(/<\?xml[^>]+\?>/, ""));
+			return this.string.replace(/<\?xml[^>]+\?>/, "");
 		}
 	},
 	
diff --git a/translators/MODS.js b/translators/MODS.js
index f2db51a51..eb282875d 100644
--- a/translators/MODS.js
+++ b/translators/MODS.js
@@ -508,7 +508,7 @@ function doImport() {
 		}
 		// try to get genre from local genre
 		for each(var genre in mods.m::genre) {
-			if(genre.@authority == "local" && Zotero.Utilities.itemTypeExists(genre)) {
+			if(genre.@authority == "local" && Zotero.Utilities.itemTypeExists(genre.text().toString())) {
 				newItem.itemType = genre.text().toString();
 			} else if(!newItem.itemType && (genre.@authority == "marcgt" || genre.@authority == "marc")) {
 				// otherwise, look at the marc genre