diff --git a/common/modules/buffer.jsm b/common/modules/buffer.jsm
index 7cb78a61..8339bdc6 100644
--- a/common/modules/buffer.jsm
+++ b/common/modules/buffer.jsm
@@ -1757,8 +1757,10 @@ var Buffer = Module("Buffer", {
                     if (arg) {
                         prefs.set("print.print_printer", PRINTER);
 
+                        let { path } = io.File(arg.substr(1));
                         set("print_to_file", true);
-                        set("print_to_filename", io.File(arg.substr(1)).path);
+                        set("print_to_filename", path);
+                        prefs.set("print_to_filename", path);
 
                         dactyl.echomsg(_("print.toFile", arg.substr(1)));
                     }
diff --git a/common/modules/dom.jsm b/common/modules/dom.jsm
index 810c86eb..0e1daa26 100644
--- a/common/modules/dom.jsm
+++ b/common/modules/dom.jsm
@@ -213,7 +213,7 @@ var DOM = Class("DOM", {
 
         for (let i = 0; i < this.length; i++) {
             let tmp = fn.call(self || update(obj, [this[i]]), this[i], i);
-            if (isObject(tmp) && "length" in tmp)
+            if (isObject(tmp) && !(tmp instanceof Ci.nsIDOMNode) && "length" in tmp)
                 for (let j = 0; j < tmp.length; j++)
                     res[res.length++] = tmp[j];
             else if (tmp != null)