If you mean on the BAN pool then no my hash rate and payout have been very stable. At first I thought I was seeing a drop in my payouts because after the difficulty change it seemed it was a day and a half later before I seen the drop But it looks normal for the change.

Edit: The reason I mention my payouts is this is what I spreadsheet out daily. As long as the payouts are right and stable over every 24hour period for my hash rate then I assume things are right no matter what's being reported on the pools dashboard. My payouts over the last 3 days  ( also over every 2 hour payout) have been spot on and show no significant  difference from day to day.

The pool also has started merge mining which I am not a big fan of after   Eleuthria explained why BTC Guild does not merge mine.