diff -r 1da53d86d722 Lib/webbrowser.py
--- a/Lib/webbrowser.py	Wed Jul 25 11:33:02 2012 +0200
+++ b/Lib/webbrowser.py	Wed Jul 25 16:59:13 2012 +0300
@@ -224,7 +224,7 @@
         cmdline = [self.name] + raise_opt + args
 
         if remote or self.background:
-            inout = io.open(os.devnull, "r+")
+            inout = subprocess.DEVNULL
         else:
             # for TTY browsers, we need stdin/out
             inout = None