diff --git a/common/content/buffer.js b/common/content/buffer.js
index 6929ce37..04af0141 100644
--- a/common/content/buffer.js
+++ b/common/content/buffer.js
@@ -437,12 +437,10 @@ var Buffer = Module("buffer", {
                         yield elems[i];
             }
 
-            // <link>s have higher priority than normal <a> hrefs
             let elems = frame.document.getElementsByTagName("link");
             for (let elem in iter(elems))
                 yield elem;
 
-            // no links? ok, look for hrefs
             elems = frame.document.getElementsByTagName("a");
             for (let elem in iter(elems))
                 yield elem;
diff --git a/common/modules/io.jsm b/common/modules/io.jsm
index ef18759f..8f0e4061 100644
--- a/common/modules/io.jsm
+++ b/common/modules/io.jsm
@@ -147,7 +147,9 @@ var IO = Module("io", {
         source: function source(filename, params) {
             const { contexts } = modules;
             defineModule.loadLog.push("sourcing " + filename);
-            params = params || {};
+
+            if (!isObject(params))
+                params = { silent: params };
 
             let time = Date.now();
             return contexts.withContext(null, function () {
@@ -793,7 +795,7 @@ unlet s:cpo_save
                 if (args.length > 1)
                     dactyl.echoerr("E172: Only one file name allowed");
                 else
-                    io.source(args[0], args.bang);
+                    io.source(args[0], { silent: args.bang });
             }, {
                 argCount: "+", // FIXME: should be "1" but kludged for proper error message
                 bang: true,
diff --git a/common/tests/functional/testCommands.js b/common/tests/functional/testCommands.js
index dd2f05b5..8cc693a0 100644
--- a/common/tests/functional/testCommands.js
+++ b/common/tests/functional/testCommands.js
@@ -607,11 +607,13 @@ var tests = {
         init: this.runtime.init,
         cleanup: this.runtime.cleanup,
         noOutput: [
+            "! .pentadactyl/some-nonexistent/really-nonexistent.js",
             ".pentadactyl/some-nonexistent/good.css",
             ".pentadactyl/some-nonexistent/good.js",
             ".pentadactyl/some-nonexistent/good.penta"
         ],
         error: [
+            ".pentadactyl/some-nonexistent/really-nonexistent.js",
             "~/.pentadactyl/some-nonexistent/bad.js",
             "~/.pentadactyl/some-nonexistent/bad.penta",
             "./.pentadactyl/some-nonexistent/bad.js",