diff -r d67905a2c39d -r 523c5c5b84e5 src/main/scala/bootstrap/liftweb/Boot.scala
--- a/src/main/scala/bootstrap/liftweb/Boot.scala	Thu Apr 12 10:52:42 2012 +0200
+++ b/src/main/scala/bootstrap/liftweb/Boot.scala	Thu Apr 12 13:36:45 2012 +0200
@@ -46,6 +46,8 @@
 
     LiftRules.htmlProperties.default.set { r: Req =>
       Html5Properties(r.userAgent) }
+
+    ScreenRules.init()
   }
 }