diff --git a/doc/release-checklist.txt b/doc/release-checklist.txt
index 9e7c6e0a..bd1cf3af 100644
--- a/doc/release-checklist.txt
+++ b/doc/release-checklist.txt
@@ -64,6 +64,7 @@ o Notify package managers
   - Fedora: Miro Hrončok <miro@hroncok.cz> or <mhroncok@redhat.com>
   - OpenSUSE: Pavol Rusnak <prusnak@opensuse.org>
   - MacPorts: Frank Schima <macports2000@gmail.com>
+  - Arch Linux: Kyle Keen <keenerd@gmail.com>
 
 Build and Upload Release Binaries
 ---------------------------------
diff --git a/openscad.pro b/openscad.pro
index 0da75f41..9f8e75f3 100644
--- a/openscad.pro
+++ b/openscad.pro
@@ -13,6 +13,10 @@
 #
 # http://en.wikibooks.org/wiki/OpenSCAD_User_Manual
 
+!experimental {
+  message("If you're building a development binary, consider adding CONFIG+=experimental")
+}
+
 isEmpty(QT_VERSION) {
   error("Please use qmake for Qt 4 (probably qmake-qt4)")
 }
diff --git a/src/AboutDialog.html b/src/AboutDialog.html
index 65a54d71..be666b67 100644
--- a/src/AboutDialog.html
+++ b/src/AboutDialog.html
@@ -92,6 +92,8 @@ Please visit this link for a copy of the license: <a href="http://www.gnu.org/li
   <a href="http://christian.amsuess.com/">chrysn</a></lu>
 <li><a href="http://fedoraproject.org/">Fedora</a> maintainer:</b>
   <a href="http://hroncok.cz/">Miro Hrončok</a></lu>
+<li><a href="https://www.archlinux.org">Arch Linux</a> maintainer:</b>
+  <a href="http://kmkeen.com">Kyle Keen</a></lu>
 </ul>
 
 <p>
diff --git a/src/Preferences.ui b/src/Preferences.ui
index 0fe9c9ea..4c76c7eb 100644
--- a/src/Preferences.ui
+++ b/src/Preferences.ui
@@ -386,7 +386,7 @@
         <item row="0" column="0">
          <layout class="QVBoxLayout" name="verticalLayout_9">
           <item>
-           <widget class="QLabel" name="label_9">
+           <widget class="QLabel" name="label_10">
             <property name="font">
              <font>
               <weight>75</weight>
diff --git a/src/QGLView.h b/src/QGLView.h
index 402a5d48..aaab8f57 100644
--- a/src/QGLView.h
+++ b/src/QGLView.h
@@ -40,7 +40,7 @@ public:
 		else this->cam.projection = Camera::PERSPECTIVE;
 	}
 	std::string getRendererInfo() const;
-#if QT_VERSION >= 0x050000
+#if QT_VERSION >= 0x050001
 	float getDPI() { return this->devicePixelRatio(); }
 #endif
 	bool save(const char *filename);
diff --git a/src/openscad.cc b/src/openscad.cc
index c6fc6f0c..76973661 100644
--- a/src/openscad.cc
+++ b/src/openscad.cc
@@ -551,7 +551,7 @@ int gui(vector<string> &inputFiles, const fs::path &original_path, int argc, cha
                new MainWindow(assemblePath(original_path, infile));
 	}
 #else
-	MainWindow *m = new MainWindow(assemblePath(original_path, inputFiles[0]));
+	new MainWindow(assemblePath(original_path, inputFiles[0]));
 #endif
 	app.connect(&app, SIGNAL(lastWindowClosed()), &app, SLOT(quit()));
 	int rc = app.exec();