diff --git a/common/modules/buffer.jsm b/common/modules/buffer.jsm
index 4e7dfc5b..a24ed855 100644
--- a/common/modules/buffer.jsm
+++ b/common/modules/buffer.jsm
@@ -457,10 +457,11 @@ var Buffer = Module("Buffer", {
         let { dactyl } = this.modules;
 
         let ctrlKey = false, shiftKey = false;
+        let button = 0;
         switch (dactyl.forceTarget || where) {
         case dactyl.NEW_TAB:
         case dactyl.NEW_BACKGROUND_TAB:
-            ctrlKey = true;
+            button = 1;
             shiftKey = dactyl.forceBackground != null ? dactyl.forceBackground
                                                       : where != dactyl.NEW_BACKGROUND_TAB;
             break;
@@ -476,7 +477,7 @@ var Buffer = Module("Buffer", {
         prefs.withContext(function () {
             prefs.set("browser.tabs.loadInBackground", true);
             let params = {
-                screenX: offsetX, screenY: offsetY,
+                button: button, screenX: offsetX, screenY: offsetY,
                 ctrlKey: ctrlKey, shiftKey: shiftKey, metaKey: ctrlKey
             };
 
diff --git a/common/modules/services.jsm b/common/modules/services.jsm
index c9992a9b..aa8d9ad5 100644
--- a/common/modules/services.jsm
+++ b/common/modules/services.jsm
@@ -105,7 +105,7 @@ var Services = Module("Services", {
         this.addClass("Transferable", "@mozilla.org/widget/transferable;1",        "nsITransferable");
         this.addClass("Timer",        "@mozilla.org/timer;1",                      "nsITimer", "initWithCallback");
         this.addClass("URL",          "@mozilla.org/network/standard-url;1",       ["nsIStandardURL", "nsIURL"], "init");
-        this.addClass("Xmlhttp",      "@mozilla.org/xmlextras/xmlhttprequest;1",   "nsIXMLHttpRequest", "open");
+        this.addClass("Xmlhttp",      "@mozilla.org/xmlextras/xmlhttprequest;1",   [], "open");
         this.addClass("XPathEvaluator", "@mozilla.org/dom/xpath-evaluator;1",      "nsIDOMXPathEvaluator");
         this.addClass("XMLDocument",  "@mozilla.org/xml/xml-document;1",           ["nsIDOMXMLDocument", "nsIDOMNodeSelector"]);
         this.addClass("ZipReader",    "@mozilla.org/libjar/zip-reader;1",          "nsIZipReader", "open", false);