For some reason when I do
"http://me@localhost:630/admin" it can take
up to 30 minutes before "CUPS 1.7.5 comes up.
The message "localhost contacted, waiting for reply" is shown and a
spinner icon.
I have never seen the @-sign in conjunction with CUPS. Also, CUPS is on
port 631.
For me,
http://localhost:631 does it.