Yes, I started having this problem yesterday in fact. My balances used to update every time the hash rate updated on the charts (every 10 minutes). Now I can go hours without seeing an update in my ready for payout, unexchanged, total expected and total profits. I'm not certain if the 1 Mh/s i'm doing during these times is being neglected or if the site is just updating less regularly. Either way, it's a concern to me. If I start seeing less than the advertised payout come through (right now it's .00650 BTC/day/Mh) then I will have to reconsider using this pool soon.