I was wondering why I could not type a "b" to the command line. :-) I am not really familiar with readline, but maybe this is what we want. Index: src/browser/baseshell.py =================================================================== --- src/browser/baseshell.py (revision 2509) +++ src/browser/baseshell.py (working copy) @@ -62,7 +62,7 @@ map(readline.add_history, self.history) readline.set_completer(self.complete) - readline.parse_and_bind("bind ^I rl_complete") + readline.parse_and_bind("tab: complete") while True: cmdline = raw_input("%s > " % (self.prefix,))