Update to the latest version (git pull), restarted it...
Still the same!
I have set an option "--fee 5.0", will it affect my current payout?
2012-03-25 21:12:28.718609 Local: 3538MH/s in last 10.0 minutes Local dead on arrival: ~1.4% (0-3%) Expected time to share: 14.6 minutes
The fee won't matter, but any miners using a real bitcoin address as the username won't show in your graph for current payouts. Check the address.. it probably has large balance by now.